Streptogramins for preparing same by mutasynthesis

ABSTRACT

The invention provides a method for preparing streptogramins using genetically-modified microorganisms to influence the biosynthesis of at least one of the precursors of the group B streptogramins. Cultures of the genetically-modified microorganisms are supplemented with a least one precursor that is different from the streptogramin precursor whose biosynthesis is altered and the streptogramins produced are recovered.

The present invention relates principally to novel compounds which arerelated to the group B streptogramins, and to a process for preparingstreptogramins by mutasynthesis. It also relates to novel genes whichare involved in the biosynthesis of precursors of the group Bstreptogramins, and to their uses.

The streptogramins form a homogeneous group of antibiotics consisting ofan association of two types of chemically different molecules; on theone hand polyunsaturated macrolactones (group A components) and, on theother hand, depsipeptides (group B components). This group comprisesnumerous antibiotics which are known under different names according totheir origin and includes pristinamycins, mikamycins and virginiamycins(Cocito 1979, 1983).

The A and B components have a synergistic antibacterial activity whichcan amount to 100 times that of the separate components and which,contrary to that of each component, is bactericidal (Cocito 1979). Thisactivity is more particularly effective against Gram positive bacteriasuch as Staphylococci and Streptococci (Cocito 1979, Videau 1982).Components A and B inhibit protein synthesis by binding to the 50Ssubunit of the ribosome (Cocito 1979; Di Gianbattista et al., 1989).

While knowledge of the routes by which each of the components isbiosynthesized still remains partial to date, earlier studies, presentedin Patent Application PCT/FR93/0923, have made it possible to identifyseveral proteins, and the corresponding structural genes, which areinvolved in the biosynthesis of the two types of component.

Two parts can be distinguished in the process for biosynthesizing groupB streptogramins:

1) Biosynthesis of the precursors, or their analogues, of themacrocycle: 3-hydropicolinic acid, L-2-aminobutyric acid,4-dimethylamino-L-phenylalanine, L-pipecolic acid and L-phenylglycine.

2) Formation of the macrocycle from the precursors listed above, fromL-threonine and from L-proline, or their analogues, with (a) possiblesubsequent modification(s) of the peptide N-methylation, epimerisation,hydroxylation and oxidation type.

Patent Application PCT/FR93/0923 relates, in particular, to the enzymeswhich catalyze incorporation of the precursors into the peptide chain ofB streptogramins in the process of elongation, and also to theirstructural genes. These results have demonstrated the non-ribosomalpeptide synthesis character of the type B components.

The present invention relates, more particularly, to novel compoundswhich are related to group B streptogramins and, more precisely, tonovel compounds of the pristinamycin I family (FIGS. 1 and 2), termed PIbelow, or of the virginiamycin S family (FIG. 3).

The major constituent of the I pristinamycins (PI) is PI_(A) (FIG. 1),which represents approximately 94% of the PI, with the remainingapproximately 6% being represented by minor constituents of thedepsipeptide (PI_(B) to PI_(I)) whose structures are depicted in FIG. 2.PI results essentially from the condensation of amino acids, certain ofwhich are essential for protein synthesis (threonine and proline) andothers of which are novel and themselves considered to be secondarymetabolites (L-2-aminobutyric acid, 4-dimethylamino-L-phenylalanine(DMPAPA), L-pipecolic acid and L-phenylglycine for PI_(A)), and also ofan aromatic precursor, 3-hydroxypicolinic acid.

The virginiamycin S derivatives result from condensation of the sameacids as in the case of PI, apart from 4-DMPAPA, which is replaced by aphenylalanine (see FIG. 3).

Production of these different compounds by biosynthesis thereforerequires preliminary synthesis, by a producer strain, of the novelprecursors identified above.

The present invention results specifically from a novel process forpreparing streptogramins which employs, as a strain for producingstreptogramins, a microorganism strain which is mutated so as to alterthe biosynthesis of the precursors of the group B streptogramins.According to this process, the said mutant strain is cultured in amedium which is supplemented with a novel precursor which is differentfrom the precursor whose biosynthesis is altered. Unexpectedly, thisresults in the production of novel compounds which are related to thegroup B streptogramins and which are of value in the therapeutic sphere.

More precisely, the present invention relates to novel compounds whichare represented by the general formula I:

in which:

R₂ and R₄ represent, independently of each other, a hydrogen atom or amethyl group,

R₃ represents a hydrogen atom or a hydroxyl group,

X represents a CO, CHOH or CH₂ group, and

R₁ represents:

with

For the Meta Derivatives

A, C, D and E representing a hydrogen atom, and B being able torepresent

a halogen, and preferably a fluorine atom,

a monoalkylamino or dialkylamino group, with alkyl preferablyrepresenting a methyl or ethyl group,

an ether group; more particularly an OR group with R being preferablyselected from among the methyl, ethyl, trifluoromethyl and allyl groups,

a thioether group, preferably represented by an alkylthio group withalkyl preferably representing a methyl group,

a C₁ to C₃ alkyl group, or

a trihalogenomethyl group, preferably trifluoromethyl

For the Para Derivatives

A, B, D and E representing a hydrogen atom, and C being able torepresent:

a halogen,

an NR₁R₂ group with R₁ and R₂ representing, independently of each other,a group selected from among

hydrogen,

a straight-chain or branched C₁ to C₄ alkyl group where, when one of thesubstituents R₁ or R₂ represents a methyl group, the other necessarilyrepresents an ethyl group,

an alkyl-cycloalkylmethyl group with a C₃ to C₄ cycloalkyl,

an optionally substituted C₃ to C₄ cycloalkyl group,

a straight-chain or branched C₁ to C₄ alkenyl group where, when one ofthe substituents R₁ or R₂ represents an alkenyl group, the other isdifferent from a methyl group or a C3 to C6 cycloalkyl,

a substituted or unsubstituted N-pyrrolidinyl group,

an ether group; preferably an OR group with R preferably being selectedfrom among the methyl and ethyl groups, where appropriate substituted bya chlorine atom, or trifluoromethyl and alkenyl groups

a thioether group, preferably represented by an alkylthio group withalkyl preferably representing a C₁ to C₃ alkyl group,

an acyl or alkoxycarbonyl group and, more particularly, a COR group withR preferably representing a C₁ to C₃ alkyl group or a C₁ to C₃ alkoxygroup,

a C₁ to C₆ alkyl group which is straight-chain or branched and which ispreferably selected from among the methyl, isopropyl and tert-butylgroups,

an alkylthiomethyl group and, more preferably, a CH2SR group with Rpreferably representing a C₁ to C₃ alkyl group,

an aryl group, preferably a phenyl group, or

a trihalogenomethyl group, preferably trifluoromethyl

For the Meta-para Disubstituted Derivatives

A, D and E representing a hydrogen atom, and B being able to represent:

a halogen, preferably a fluorine atom,

a monoalkylamino or dialkylamino group with alkyl preferablyrepresenting a methyl or ethyl group,

an ether group and preferably an OR group with R preferably selectedfrom among the methyl, ethyl and trifluoromethyl groups,

a thioether group and preferably alkylthio with alkyl preferablyrepresenting an ethyl group, or

a C₁ to C₃ alkyl group, and C being able to represent:

a halogen, preferably a fluorine atom,

an amino, monoalkylamino or dialkylamino group with alkyl preferablyrepresenting a methyl group with the proviso that B is different from abromine or chlorine atom, or a substituted or unsubstituted allyl group,

an ether group and preferably an OR group with R preferably selectedfrom among the methyl, ethyl and trifluoromethyl groups,

a thioether group and preferably an alkylthio group with alkylpreferably representing a methyl group,

a C₁ to C₆ alkyl group, or

a trihalogenomethyl group, preferably trifluoromethyl, and

For the Ortho-para Disubstituted Derivatives

B, E and D representing a hydrogen atom and A and C a methyl group.

The following may be more particularly mentioned as preferred compounds:

4ζ-methylthio-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-methylthio-de(4ζ-dimethylamino)pristinamycin I_(H),

5γ-hydroxy-4ζ-methylthio-de(4ζ-dimethylamino)pristinamycin I_(H),

4ζ-methyl-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-methyl-de(4ζ-dimethylamino)pristinamycin I_(H),

4ζ-methoxy-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-methoxycarbonyl-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-chloro-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-bromo-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-bromo-de(4ζ-dimethylamino)pristinamycin I_(H),

4ζ-idodo-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-iodo-de(4ζ-dimethylamino)pristinamycin I_(H),

4ζ-trifluoromethoxy-de(4ζ-dimethylamino)pristinamycin I_(A)

4ζ-trifluoromethyl-de(4ζ-dimethylamino)pristinamycin I_(H),

4ζ-tert-butyl-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-isopropyl-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-isopropyl-de(4ζ-dimethylamino)pristinamycin I_(E),

4ε-methylamino-de(4ζ-dimethylamino)pristinamycin I_(A),

4ε-methoxy-de(4ζ-dimethylamino)pristinamycin I_(A),

4ε-methoxy-de(4ζ-dimethylamino)pristinamycin I_(H)

4ε-fluoro 4ζ-methyl-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-amino-de(4ζ-dimethylamino)pristinamycin IA,

4ζ-ethylamino-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-diethylamino-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-allylamino-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-diallylamino-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-allylethylamino-de(4ζ-dimethylamino)pristinamycin I_(A),

4 -ethylpropylamino-de(4 ζ-dimethylamino)pristinamycin I_(A),

4ζ-ethylisopropylamino-de(4ζ-dimethylamino)pristinamycin I_(A),

4 -ethylmethylcyclopropylamino-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-(1-pyrrolidinyl)-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-trifluoromethoxy-de(4ζ-dimethylamino)pristinamycin I_(A),

4 -allyloxy-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-ethoxy-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-ethylthio-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-methylthiomethyl-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-(2-chloroethoxy)-de(4ζ-dimethylamino)pristinamycin I_(A)

4ζ-acetyl-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-ethyl-de(4ζ-dimethylamino)pristinamycin I_(A),

4ζ-ethyl-de(4ζ-dimethylamino)pristinamycin I₄,

4ε-dimethylamino-de(4ζ-dimethylamino)pristinamycin I_(A),

4ε-methylthio-de(4ζ-dimethylamino)pristinamycin I_(A),

4ε-ethoxy-de(4-dimethylamino)pristinamycin I_(A).

The present invention is also directed towards a process which isparticularly useful for preparing the compounds of the general formulaI.

More precisely, it relates to a process for preparing streptogramins,characterized in that it employs a streptogramin-producing microorganismstrain which possesses at least one genetic modification which affectsthe biosynthesis of a precursor of the group B streptogramins, and inthat the said mutant strain is cultured in a culture medium which isappropriate and which is supplemented with at least one novel precursorwhich is different from that whose biosynthesis is altered, and in thatthe said streptogramins are recovered.

The strains which are employed within the scope of the present inventionare therefore strains which produce streptogramins and which aremutated. The genetic modification(s) can be located either within one ofthe genes which is involved in the biosynthesis of the said precursorsor outside the coding region, for example in the regions responsible forthe expression and/or the transcriptional or post-transcriptionalregulation of the said genes, or in a region belonging to the transcriptcontaining the said genes.

According to one particular embodiment of the invention, the mutantstrains possess one or more genetic modifications within at least one oftheir genes which is/are involved in the biosynthesis of the group Bstreptogramin precursors.

This or these genetic modification(s) alter(s) the expression of thesaid gene, that is render(s) this gene, and, as the case may be, anotherof the genes involved in the biosynthesis of the precursors, partiallyor totally incapable of encoding the natural enzyme which is involved inthe biosynthesis of at least one precursor. The inability of the saidgenes to encode the natural proteins may be manifested either by theproduction of a protein which is inactive due to structural orconformational modifications, or by the absence of production, or by theproduction of a protein having an altered enzymatic activity, or else bythe production of the natural protein at an attenuated level or inaccordance with a desired mode of regulation. The totality of thesepossible manifestations is expressed by an alteration of, or perhaps ablockage in, the synthesis of at least one of the group B streptograminprecursors.

The genes which are capable of being mutated within the scope of thepresent invention are preferably the genes which are involved in thebiosynthesis of the following precursors: L-2-aminobutyric acid,4-dimethylamino-L-phenylalanine (DMPAPA), L-pipecolic acid,L-phenylglycine and/or 3-hydroxypicolinic acid (3-HPA).

These genes are more preferably the papA, (SEQ ID No. 14), papM (SEQ IDNo. 16), papC, (SEQ ID No. 2) papB (SEQ ID No. 4) pipA SEQ ID No: 7),snbF (SEQ ID NO: 9) and hpaA (SEQ ID NO: 12) genes described below.

The papA and papM genes have already been described in PatentApplication PCT/FR93/0923. They are present on the cosmid pIBV2. ThepapA gene appears to correspond to a gene for biosynthesizing4-amino-L-phenylalanine from chorismate. The 4-amino-L-phenylalanine isthen dimethylated by the product of the papM gene, anN-methyltransferase, in order to form 4-dimethylamino-L-phenylalanine,DMPAPA, which is then incorporated into pristinamycin I_(A). These twogenes are more particularly involved, therefore, in the synthesis of theprecursor termed DMPAPA.

The other genes, papB, papC, pipA, snbF and hpaA, have been identifiedand characterized within the scope of the present invention. They aregrouped together with the snbA, papA and papM genes on a chromosomalregion of approximately 10 kb (FIG. 7).

The sequence homologies demonstrated for the PapB (SEQ ID No. 5) andPapC (SEQ ID No. 3) proteins show that these proteins are also involved,jointly with the PapA (SEQ ID No. 15) and PapM (SEQ ID No. 17) proteins,in the biosynthesis of the DMPAPA precursor. The two corresponding novelgenes, papB and papC, were isolated and identified by subcloning whichwas carried out using cosmid pIBV2, described in Patent ApplicationPCT/FR93/0923, and a plasmid, pVRC900, which is derived from pIBV2 bymeans of a HindIII deletion and is also described in Patent ApplicationPCT/FR93/0923.

The comparison of the protein encoded by the papC gene with the proteinsequences contained in the Genpro library shows a 27% homology with theregion which is involved in the prephenate dehydrogenase activity of thebifunctional TyrA proteins of E. coli (Hudson and Davidson, 1984) andErwinia herbicola (EMBL data library, 1991). This region of TyrAcatalyzes aromatization of the prephenate to form4-hydroxyphenylpyruvate in the biosynthesis of tyrosine. A similararomatization, which proceeds from 4-deoxy-4-aminoprephenate and leadsto 4-aminophenyl-pyruvate is very probably involved in the synthesis ofDMPAPA. It would be catalyzed by the PapC protein (SEQ ID No. 2).

PapB possesses a 24 to 30% homology with the region which is involved inthe chorismate mutase activity of the TyrA and PheA bifunctionalproteins of E. coli (Hudson and Davidson, 1984) and of the TyrA proteinof Erwinia herbicola. This region catalyzes isomerization of thechorismate to form prephenate in the biosynthesis of tyrosine and ofphenylalanine. The PapB protein (SEQ ID No. 3) is probably involved in asimilar isomerization which proceeds from 4-deoxy-4-aminochorismate andleads to 4-deoxy-4-aminoprephenate in the synthesis of DMPAPA.

The pipA, snbF and hpaA genes have been located in the regions which arecontained between the snbA gene, which encodes 3-hydroxypicolinic acidAMP ligase and is described in Patent Application PCT/FR93/0923, and thepapA or snbR genes. They were located accurately by means of subcloning,which was carried out using the plasmid pVRC900 and the cosmid pIBV2,which are described in Patent Application PCT/FR93/0923.

On comparing the protein encoded by the hpaA gene and the proteinsequences contained in the Genpro library, a homology of from 30 to 40%was detected with a group of proteins which are probably involved(Thorson et al., 1993) in the transamination of intermediates in thebiosynthesis of various antibiotics (DnrJ, EryC1, TylB, StrS and PrgL).Synthesis of the 3-HPA precursor, which appears to derive from lysine byanother route than that of cyclodeamination (see examples 1-2 and 2-1),probably requires a transamination step which can be catalyzed by theproduct of this gene termed hPaA (SEQ ID No. 12). Furthermore, theresults of mutating this gene demonstrate unequivocally that it isinvolved in the synthesis of the 3-HPA precursor.

Comparison of the product encoded by the gene termed pipA with theprotein sequences contained in the Genpro library shows a 30% homologywith the ornithine cyclodeaminase of Agrobacterium tumefaciens(Schindler et al., 1989). This enzyme is involved in the final step ofthe catabolism of octopine; it converts L-ornithine into L-proline bymeans of cyclodeamination. Authors have demonstrated, by means ofincorporating labelled lysine, that 4-oxopipecolic acid and3-hydroxypicolinic acid, which are found both in PI_(A) and invirginiamycin S1, derived from lysine (Molinero et al., 1989, Reed etal., 1989). Cyclodeamination of lysine, in a similar manner to thatdescribed for ornithine, would lead to the formation of pipecolic acid.Taking this hypothesis into account, this product was termed PipA (SEQID No. 7). The results of mutating the pipA gene, presented in theexamples below, demonstrate that it is involved solely in the synthesisof pipecolic acid. It is noted, in particular, that this mutation has noeffect on the biosynthesis of 3-hydroxypicolinic acid, which is alsoderived from lysine and of which pipecolic acid could have been aprecursor.

Finally, on comparing the product of the gene termed snbF with theprotein sequences contained in the Genpro library, a 30 to 40% homologywas noted with several hydroxylases of the cytochrome P450 type, whichare involved in the biosynthesis of secondary metabolites (Omer et al.,1990. Trower et al., 1992). Several hydroxylations can be envisaged inthe biosynthesis of the precursors of pristinamycin I, in particular inthe biosynthesis of 3-HPA (hydroxylation of picolinic acid at the 3position) and of 4-oxopipecolic acid (hydroxylation of pipecolic acid atthe 4 position). The corresponding protein was termed SnbF (SEQ ID No.9).

The results of mutating the pipA gene, with polar effects on theexpression of the snbF gene, demonstrate the involvement of the snbFgene in the hydroxylation of the pipecolic acid residue of group Bstreptogramins. The expression of the snbF gene is thus altered by theexpedient of effecting a genetic modification of the pipA gene.

Preferentially, the genetic modification(s) render(s) the said genepartially or totally incapable of encoding the natural protein.

Genetic modification should be understood to mean, more particularly,any suppression, substitution, deletion, or addition of one or morebases in the gene(s) under consideration. Such modifications may beobtained in vitro (on the isolated DNA) or in situ, for example, bymeans of genetic engineering techniques, or else by exposing the saidmicroorganisms to a treatment using mutagenic agents. Examples ofmutagenic agents which may be cited are physical agents such ashigh-energy rays (X, γ, ultraviolet etc. rays), or chemical agents whichare able to react with different functional groups of the DNA bases,and, for example, akylating agents [ethyl methanesulphonate (EMS),N-methyl-N′-nitro-N-nitrosoguanidine, and N-nitroquinoline-1-oxide(NQO)], bialkylating agents, intercalating agents, etc. Deletion isunderstood to mean any suppression of a part for all of the gene underconsideration. This deletion can, in particular, be of a part of theregion encoding the said proteins, and/or of all or part of the promoterregion for transcription or translation, or else of the transcript.

The genetic modifications may also be obtained by means of genedisruption, for example using the protocol initially described byRothstein [Meth. Enzymol. 101 (1983) 202] or, advantageously, by meansof double homologous recombination. In this case, the integrity of thecoding sequence will preferentially be disrupted in order to permit, ifneed be, replacement, by means of homologous recombination, of thewild-type genomic sequence with a non-functional or mutant sequence.

According to another option of the invention, the genetic modificationscan consist of placing the gene(s) encoding the said proteins under thecontrol of a regulated promoter.

The mutant microorganism strains according to the present invention maybe obtained from any microorganism which produces streptogramins (cf.Table V). According to one particular embodiment of the invention, themutant strain is a strain which is derived from S. pristinaespiralisand, more particularly, from S. pristinaespiralis SP92.

Mutant strains which are preferred within the scope of the presentinvention and which may more particularly be mentioned are the strainSP92::pVRC508, which is mutated in the biosynthesis of the DMPAPAprecursor by disrupting the papA gene by means of simple crossing over,or else, more preferably, the strain SP212, which is mutated in thebiosynthesis of the DMPAPA cursor by disrupting the papA gene by meansof double homologous recombination. These strains no longer produce PIunless they are supplemented with the DMPAPA precursor. Unexpectedly,when a novel precursor, which is different from DMPAPA and which iscapable, after, in this case, metabolization, of being incorporated byPI synthetase III (SnbD protein which is responsible for incorporatingL-proline and DMPAPA residues) is added to the production medium, thesetwo strains then become able to produce novel I pristinamycins orvirginiamycins, or else mainly to produce a component which is normallya minor component of PI, in particular PI_(B) (FIG. 2).

Two other mutant strains have been prepared within the scope of thepresent invention. These are, respectively, the strainSP92pipA::Ωam^(R), in which the pipA gene is disrupted by homologousrecombination, and the strain SP₉₂hpaA::Ωam^(R), in which the hpaA geneis disrupted. While strain SP92pipA::Ωam^(R) no longer produces PI understandard fermentation conditions, it strongly produces, in the presenceof L-pipecolic acid, a component, which was initially a minor componentamong the B streptogramin components, in which 4-oxopipecolic acid isreplaced by L-pipecolic acid. While strain S. pristinaespiralisSP92hpaA::Ωam^(R) no longer produces PI under standard fermentationconditions, it is able to produce novel group B streptogramins in thepresence of novel precursors.

By supplementing the medium for culturing mutant strains according tothe invention with at least one novel precursor, it turns out that it ispossible to orient biosynthesis either towards novel streptogramins, ortowards a minor form of the streptogramins, or else to favour formationof one of the streptogramins.

The precursors which are employed within the scope of the presentinvention can be derivatives or analogues of amino acids and, moreparticularly of phenylalanine, as well as organic acids and, inparticular, alpha-cetocarboxylic acids and, more particularly,derivatives of phenylpyruvic acid.

Naturally, the novel precursor is such that it complements thealteration or blockage, which is induced in accordance with theinvention, within the biosynthesis of one of the natural precursors ofthe group B streptogramins and leads to the synthesis of streptogramins.According to one particular embodiment of the invention, this novelprecursor is selected such that it is related to the precursor whosebiosynthesis is altered. Thus, in the specific case of the mutant whichis blocked in the biosynthesis of DMPAPA, the novel precursor ispreferably a derivative of phenylalanine.

The following may, in particular, be cited as precursors which aresuitable for the invention:

Phenylalanine, 4-dimethylaminophenylalanine, 4-methylaminophenylalanine,4-aminophenylalanine, 4-diethylaminophenylalanine,4-ethylaminophenylalanine, 4-methylthiophenylalanine,4-methylphenylalanine, 4-methoxyphenylalanine,4-trifluoromethoxyphenylalanine, 4-methoxycarbonylphenylalanine,4-chlorophenylalanine, 4-bromophenylalanine, 4-iodophenylalanine,4-trifluoromethylphenylalanine, 4-tert-butylphenylalanine,4-isopropylphenylalanine, 3-methylaminophenylalanine,3-methoxyphenylalanine, 3-methylthiophenylalanine,3-fluoro-4-methylphenylalanine, L-pipecolic acid,4-tert-butylphenylpyruvic acid, 4-methylaminophenylpyruvic acid,2-naphthylphenylalanine, 4-fluorophenylalanine,3-trifluorophenylalanine, 3-ethoxyphenylalanine, 2,4-dimethylphenylalanine, 3,4-dimethylphenylalanine,3-methylphenylalanine, 4-phenylphenylalanine, 4-butylphenylalanine,2-thienyl-3-alanine, 3-trifluoromethylphenylalanine,3-hydroxyphenylalanine, 3-ethylaminophenylalanine,4-allylaminophenylalanine, 4-diallylaminophenylalanine,4-allylethylaminophenylalanine, 4-ethylpropylaminophenylalanine,4-ethylisopropylaminophenylalanine,4-ethylmethylcyclopropylaminophenylalanine,4-(1-pyrrolidinyl)phenylalanine, 4-O-allyltyrosine, 4-O-ethyltyrosine,4-ethylthiophenylalanine, 4-ethylthiomethylphenylalanine,4-O-(2-chloroethyl)tyrosine, 4-acetylphenylalanine,4-ethylphenylalanine, 3-dimethylaminophenylalanine,3-ethoxyphenylalanine, 3-fluoro-4-methylphenylalanine and4-aminomethylphenylalanine.

Among these precursors, 4-trifluoromethoxyphenylalanine,3-methylaminophenylalanine, 3-methylthiophenylalanine,3-fluoro-4-methylphenylalanine, 4-methylaminophenylpyruvic acid,3-ethoxyphenylalanine, 4-allylaminophenylalanine,4-diallylaminophenylalanine, 4-allylethylaminophenylalanine,4-ethylpropylaminophenylalanine, 4-ethylisopropylaminophenylalanine,4-ethylmethylcyclopropylaminophenylalanine,4-(1-pyrrolidinyl)phenylalanine, 4-ethylthiomethylphenylalanine,4-O-(2-chloroethyl)tyrosine, 3-dimethylaminophenylalanine and3-ethylaminophenylalanine are novel and were prepared and characterizedwithin the scope of the present invention. They are found to beparticularly useful for preparing streptogramins according to theinvention.

The claimed process turns out to be particularly advantageous forpreparing novel group B streptogramins or else for favouring formationof particular streptogramins. As such, it is particularly useful forpreparing PI_(B).

The present invention also relates to a nucleotide sequence which isselected from among:

(a) all or part of the genes papC (SEQ ID No. 2), papB (SEQ ID No. 4),pipA (SEQ ID No. 7), snbF (SEQ ID No. 9) and hpaA (SEQ ID No. 12),

(b) sequences which hybridize with all or part of the (a) genes, and

(c) sequences which are derived from (a) and (b) sequences on account ofthe degeneracy of the genetic code.

In the particular case of the hybridizing sequences according to (b),these sequences preferably encode a polypeptide which is involved in thebiosynthesis of the streptogramins.

Still more preferably, the invention relates to the nucleotide sequenceswhich are represented by the genes papC (SEQ ID No. 2), papB (SEQ ID No.4), pipA (SEQ ID No. 7), snbF (SEQ ID No. 9), and hpaA (SEQ ID No. 12).

The invention furthermore relates to any recombinant DNA whichencompasses a papC (SEQ ID No. 2), papB (SEQ ID No. 4), pipA (SEQ ID No.7), snbF (SEQ ID No. 9) or hpaA (SEQ ID No. 12) gene.

Naturally, the nucleotide sequences defined above can be part of avector of the expression vector type, which can be an autonomouslyreplicating vector, an integrated vector or a suicide vector. Thepresent invention is also directed to these vectors as well as to anyuse of a sequence according to the invention or of a correspondingvector for, in particular, preparing metabolites of interest. Itfurthermore relates to any polypeptide which results from the expressionof a claimed sequence.

The present invention also relates to any mutated S. pristinaespiralisstrain which possesses at least one genetic modification within one ofthe papC (SEQ ID No. 2), papB (SEQ ID No: 4), pipA (SEQ ID No. 7), snbF(SEQ ID No. 9) and hpaA (SEQ ID No: 12) genes, and, more preferably, tostrains SP92pipA::Ωam^(R) and SP92hpaA::Ωam^(R), as well as any S.pristinaespiralis strain, such as SP212, which possesses a geneticmodification which consists of a disruption of the papA gene by means ofdouble homologous recombination.

Combinations of a component of the group A streptogramins and of acompound of the general formula I, according to the invention,constitute compositions which are particularly advantageous in thetherapeutic sphere. They are employed, in particular, for treatingailments which are due to Gram-positive bacteria (of the generaStaphylococci, Streptococci, Pneumococci and Enterococci) andGram-negative bacteria (of the genera Haemophilus, Gonococci,Meningococci). Thus, the compounds according to the invention have asynergistic effect on the antibacterial action of pristinamycin IIB onStaphylococcus aureus IP8203 in mice in vivo, at oral doses which areprincipally between 30 mg/kg and 100 mg/kg, when they are combined inPI/PII proportions of the order of 30/70.

The present invention extends to any pharmaceutical composition whichcontains at least one compound of the general formula I which is or isnot combined with a group A streptogramin.

The examples appearing below are presented by way of illustrating thepresent invention and do not limit it.

LIST OF FIGURES

FIG. 1: Structure of pristinamycin I_(A).

FIG. 2: Structure of the minor components of pristinamycin I.

FIG. 3: Other examples of structures of B components of streptogramins.

FIG. 4: Depiction of the PstI-XhoI region of 2.9 kb.

FIG. 5: Depiction of the XhoI-PstI region of 4.5 kb.

FIG. 6: Depiction of the HindIII-BglII region of 1.6 kb.

FIG. 7: Depiction of the BglII-XhoI region of approximately 10 kb.

FIG. 8: Depiction of plasmid pVRC415.

FIG. 9: Depiction of plasmid pVRC420.

FIG. 10: Depiction of plasmid pVRC411.

FIG. 11: Depiction of plasmid pVRC421.

FIG. 12: Depiction of plasmid pVRC414.

FIG. 13: Strategy for constructing SP212.

EXAMPLE 1 Sequencing and Identification of Genes Involved in theBiosynthesis of Pristinamycin I and Its Precursors

Identification, by means of sequencing, of the genes situated downstreamand upstream of the gene which encodes the enzyme PapA and which isdescribed in Patent PCT/FR93/0923, as well as of a gene which issituated downstream of the gene which encodes the enzyme SnbA and whichis also described in Patent PCT/FR93/0923.

This example describes how, using cosmid pIBV2, which is described inPatent PCT/FR93/0923 and which contains the structural genes for theenzymes PapA and PapM, which are involved in the synthesis of the4-dimethylamino-L-phenylalanine (DMPAPA) precursor of pristinamycin I,and the structural gene for the enzyme SnbA, which is responsible foractivating the aromatic precursor, 3-hydroxypicolinic acid (3-HPA), ofpristinamycin I, it proved possible to identify, by sequencing aroundthese genes and studying the corresponding mutants, other genes whichare involved in the biosynthesis of the DMPAPA precursor or in thebiosynthesis of other precursors of pristinamycin I.

With this aim in mind, subclonings were carried out using cosmid pIBV2and plasmid pVRC900, which is derived from pIBV2 by means of a HindIIIdeletion and which is also described in Patent PCT/FR93/0923.

This example illustrates how the nucleotide sequences of fragmentssituated downstream and upstream of the papA and snbA genes of S.pristinaespiralis

can be obtained.

The techniques for cloning DNA fragments of interest in the M13mp18 and19 vectors (Messing et al. 1981) are standard techniques for cloning inEscherichia coli and are described in Maniatis et al. (1989).

1-1 Sequencing and Analysis of the Region Downstream of the PaPA Gene

In order to sequence this region, which is contained between the papAand papM genes, the PstI-PstI fragment of 1.5 kb, the PstI-XhoI fragmentof 0.7 kb, and the XhoI-XhoI fragment of 0.7 kb were subcloned into theM13mp18 and M13mp19 vectors proceeding from plasmid pVRC900. The cloningsites were sequenced through by sequencing on double-stranded DNA usingplasmids pVRC900 and pVRC409, which are described in PatentPCT/FR93/0923.

The clonings were carried out as follows. Approximately 2 μg of plasmidpVRC900 were cut with restriction enzymes PstI and/or XhoI (New EnglandBiolabs) under the conditions recommended by the supplier. Therestriction fragments thus obtained were separated on a 0.8% agarosegel, and the 1.5 kb PstI-PstI, 0.7 kb PstI-XhoI and 0.7 kb XhoI-XhoIfragments of interest were isolated and purified using Geneclean(Bio101,

La Jolla, Calif.). For each cloning, approximately 10 ng of M13mp19and/or M13mp18, cut with PstI and/or XhoI, were ligated to 100 ng of thefragment to be cloned under the conditions described by Maniatis et al.1989. After transforming the strain TG1 (K12, Δ(lac-pro) supE thi hsd ΔSF′ traD36 proA⁺B⁺ lacI^(q) lacZ Δ M15; Gibson, 1984) and selecting lysisplaques on an LB+X-gal+IPTG medium in accordance with the techniquedescribed by Maniatis et al. (1989), the phage carrying the desiredfragments were isolated. The different inserts were sequenced by thechain termination reaction using, as the synthesis primer, the universalprimer or synthetic oligonucleotides which were complementary to a 20nucleotide sequence of the insert to be sequenced. The reactions werecarried out using fluorescent dideoxynucleotides (PRISM Ready ReactionDyeDeoxy Terminator Cycle Sequencing Kit-Applied Biosystem) and analysedon a model 373 A Applied Biosystems DNA sequencer. The overlap betweenthese different inserts was such that it was possible to establish theentire nucleotide sequence between the papA and papM genes (SEQ ID No.1).

With the aid of this nucleotide sequence, it is possible to determinethe open reading frames and thereby identify genes which are involved,in S. pristinaespiralis, in the biosynthesis of PI or its precursors, aswell as the polypeptides encoded by these genes.

We looked for the presence of open reading frames within the 2.9 kbPstI-XhoI fragment, which contains the nucleotide sequence between thepapA and papM genes, making use of the fact that Streptomyces DNAdisplays a high percentage of G and C bases as well as a strong bias inthe use of codons which make up the coding frames (Bibb et al. 1984).The method of Staden and McLachlan (1982) makes it possible to calculatethe probability of coding frames in terms of the codon usage ofStreptomyces genes which have already been sequenced and which areassembled in a data file which contains 19673 codons and which wasobtained using the BISANCE (Dessen et al. 1990) computer server.

Using this method, it was possible to characterize four highly probableopen reading frames within the 2.9 kb PstI-XhoI fragment, which readingframes are depicted in the table below (TABLE I). They are designatedframes 1 to 4 according to their position starting from the PstI site.The length of each reading frame in bases, has been indicated, as hasits position within the fragment (the PstI site being situated atposition 1); the number of amino acids in the encoded polypeptide hasalso been indicated for open reading frames 2 and 3. Frames 1, 3 and 4are encoded by the same strand, while frame 2 is encoded by thecomplementary strand (FIG. 4). Frames 1 and 4 correspond, respectively,to the C-terminal region of the PapA protein and to the N-terminalregion of the PapM protein, which proteins were previously identifiedand described in Patent PCT/FR93/00923.

TABLE I Frame number Number of Number of and/or gene name Positionnucleotides amino acids 1 (PapA)  1-684 684 — 2 (PapC) (inv)  949-1836888 296 3 (PapB) 1873-2259 387 129 4 (PapM) 2259-2887 629 —

Comparison of the product of frame 2 (TABLE I) with the proteinsequences contained in the Genpro library shows a 27% homology with theregion involved in the prephenate dehydrogenase activity of thebifunctional TyrA proteins of E. coli (Hudson and Davidson, 1984) and ofErwinia herbicola (EMBL data library, 1991). This region of TyrAcatalyzes aromatization of prephenate to form 4-hydroxyphenylpyruvate inthe biosynthesis of tyrosine. A similar aromatization, proceeding from4-deoxy-4-aminoprephenate and leading to 4-aminophenylpyruvate is veryprobably involved in the synthesis of DMPAPA. This reaction will becatalyzed by the product of frame 2, termed PapC (SEQ ID N : 3).

Comparison of the product of frame 3 (TABLE I) with the proteinsequences contained in the Genpro library shows a 24 to 30% homologywith the region involved in the chorismate mutase activity of thebifunctional TyrA and PheA proteins of E. coli (Hudson and Davidson,1984) and of the TyrA protein of Erwinia herbicola. This regioncatalyzes isomerization of chorismate to form prephenate in thebiosynthesis of tyrosine and phenylalanine. A similar isomerization,proceeding from 4-deoxy-4-amino chorismate and leading to4-deoxy-4-aminoprephenate, is very probably involved in the synthesis ofDMPAPA. This reaction would be catalyzed by the product of frame 3,termed PapB (SEQ ID No: 5).

In the case of TyrA and PheA, the chorismate mutase and prephenatedehydratase, or prephenate dehydrogenase, activities are catalyzed bythe same protein. In S. pristinaespiralis, the chorismate mutase andprephenate dehydrogenase enzyme activities are catalyzed by two separateproteins, i.e. PapB and PapC, respectively.

The sequence homologies demonstrated for the PapB and PapC proteinsdemonstrate that these two proteins are involved, jointly with the PapAand PapM proteins, in the biosynthesis of the aromatic derivativeDMPAPA. In the same way as for papA, disruption of the papB and papCgenes should lead to the construction of S. pristinaespiralis strainswhich are incapable of producing PI but which are able, in the presenceof novel precursors, to produce new PIs which are modified at the levelof the DMPAPA residue.

1-2. Sequencing and Analysis of the Region Upstream of the PapA Gene

This region is contained between the snbA gene, which encodes3-hydroxypicolinic acid AMP ligase and which is described in PatentPCT/FR93/00923, and the papA gene.

The clonings were carried out as described in Example 1-1, proceedingfrom plasmid pVRC900 and cosmid pIBV2, which are described in PatentPCT/FR93/00923. The 1.3 kb XhoI-XhoI, 0.2 kb XhoI-XhoI, 3.3 kbXhoI-XhoI, 1.1 kb HindIII-PstI and 2.2 kb PstI-PstI fragments weresubcloned into the M13mp18 and M13mp19 vectors. These different cloningsmade it possible to pass through all the cloning sites. The differentinserts were sequenced as described in 1-1 using, as synthesis primer,the universal primer or synthetic oligonucleotides which werecomplementary to a 20 nucleotide sequence in the insert to be sequenced.

The overlap between these different inserts enabled the entirenucleotide sequence which is present between the snbA and papA genes(SEQ ID No: 6) to be established.

On the basis of this nucleotide sequence, it is possible to determinethe open reading frames and to identify genes which are involved, in S.pristinaespiralis, in the biosynthesis of precursors of PI, as well asthe polypeptides encoded by these genes.

We have looked for the presence of open reading frames within the 4.5 kbXhoI-PstI fragment, which contains the nucleotide sequence between thesnbA and papA genes, as described in Example 1.1. Using this method, itwas possible to characterize four highly probable open reading frameswithin the 4.5 kb XhoI-PstI fragment, which frames are depicted in thetable below (TABLE II). They are designated frames 1 to 4 in accordancewith their position starting from the XhoI site. Their length in bases,and their position within the fragment (the XhoI site being situated atposition I) has been indicated for each fragment; the number of aminoacids within the encoded polypeptide has also been indicated for openreading frames 2 and 3. Frames 2, 3 and 4 are encoded by the samestrand, and frame 1 is encoded by the complementary strand (FIG. 5).Frames 1 and 4 correspond, respectively, to the N-terminal regions ofthe SnbA and PapA proteins, which were previously identified anddescribed in patent PCT/FR93/00923.

TABLE II Frame number Number of Number of and/or gene name Positionnucleotides amino acids 1 (SnbA)(inv)  1-329 329 — 2 (PipA)  607-16711065 355 3 (SnbF) 1800-2993 1194 396 4 (PapA) 3018-4496 1479 —

Comparison of the product of frame 2 (TABLE II) with the proteinsequences contained in the Genpro library shows a 30% homology withornithine cyclodeaminase of Agrobacterium tumefaciens (Schindler et al.,1989). This enzyme is involved in the final step in the catabolism ofoctopine; it converts L-ornithine into L-proline by means ofcyclodeamination. Authors have demonstrated, by means of theincorporation of labelled lysine, that 4-oxopipecolic acid and3-hydroxypicolinic acid, which are found both in PI_(A) and invirginiamycin S1, derived from lysine (Molinero et al., 1989; Reed etal., 1989). A reaction in which lysine was cyclodeaminated, similar tothat described for ornithine, would lead to the formation of pipecolicacid. Taking this hypothesis into account, the product of frame 2 wastermed PipA (SEQ ID No: 8). The results of mutating the pipA gene,presented in 2-1, demonstrate that the pipA gene is involved solely inthe synthesis of pipecolic acid, since this mutation has no effect onthe biosynthesis of 3-hydroxypicolinic acid, which is also derived fromlysine and of which pipecolic acid could have been a precursor.

Comparison of the product of frame 3 (TABLE II) with the proteinsequences contained in the Genpro library shows a 30 to 40% homologywith several hydroxylases of the cytochrome P450 type, whichhydroxylases are involved in the biosynthesis of secondary metabolites(Omer et al., 1990, Trower et al., 1992). Several hydroxylations can beenvisaged in the biosynthesis of precursors of pristinamycin I, inparticular in the biosynthesis of 3-HPA (hydroxylation of picolinic acidat the 3 position) and of 4-oxopipecolic acid (hydroxylation ofpipecolic acid at the 4 position). The results of mutating the pipAgene, presented in 2-1-3, demonstrate that the product of frame 3 isinvolved in hydroxylation of the pipecolic acid residue of PI_(E). Thecorresponding gene has therefore been termed snbF, and the correspondingprotein SnbF (therefor) (SEQ ID NO:(and SEQ ID NO:10, respectively).

1-3. Sequencing the Region Downstream of the SnbA Gene

This region is included between the snbA gene, which encodes3-hydroxypicolinic acid adenylate ligase, and the snbR gene, whichencodes a membrane protein which is probably responsible for transportand for resistance to PI, with both genes having been described inPatent PCT/FR93/00923. Sequencing of this region was carried out using afragment which was isolated from cosmid pIBV2, as described in Example1-1 .

The 1.6 kb HindIII-BglII fragment was subcloned into the M13mp18 andM13mp19 vectors, proceeding from cosmid pIBV2. The insert was sequencedas described in 1-1, using, as synthesis primer, the universal primer orsynthetic oligonucleotides which were complementary to a 20 nucleotidesequence of the insert to be sequenced. On the basis of the nucleotidesequence thus obtained (SEQ ID No: 11), it is possible to determine theopen reading frames and to identify, in S. pristinaespiralis, geneswhich are involved in the biosynthesis of the precursors of PI, as wellas the polypeptides encoded by these genes. We looked for the presenceof open reading frames within the 1.6 kb HindIII-BglII fragment, whichcorresponds to the end of the snbA gene and its downstream region, asdescribed in Example 1-1. A complete open coding frame, encoded by thesame strand as the snbA gene (FIG. 6), was detected. Relative toposition 1, corresponding to the HindIII site, this frame starts atnucleotide 249, i.e. 30 nucleotides after the end of the snbA gene, andterminates at nucleotide 1481. It is 1233 nucleotides in size,corresponding to a protein of 411 amino acids.

Comparison of the product of this open frame with the protein sequencescontained in the Genpro library shows a 30 to 40% homology with a groupof proteins which are probably involved (Thorson et al., 1993) in thetransamination of intermediates in the biosynthesis of variousantibiotics (DnrJ, EryCl, TylB, StrS and PrgL). Synthesis of the 3-HPAprecursor, which appears to derive from lysine by a route other thancyclodeamination (see Examples 1-2 and 2-1), could necessitate atransamination step which can be catalyzed by the product of this frame3, termed HpaA (SEQ ID No: 13). The results of mutating this gene,presented in 2-2, demonstrate unequivocally that this gene is involvedin synthesis of the 3-HPA precursor and confirm our hypothesis.

The genes papB, papC, pipA, snbF and hpaA, which are described in thepresent invention, are grouped together with the snbA, papA and papMgenes on a chromosomal region of approximately 10 kb (FIG. 7). Thisconfirms the presence of a cluster of genes which are involved in thebiosynthesis of PI and its precursors. Studying regions upstream anddownstream of this cluster should enable the other genes involved in thebiosynthesis of PI precursors, in particular L-phenylglycine andL-2-aminobutyric acid, to be identified.

EXAMPLE 2 Construction of Recombinant Strains by Means of DisruptingIdentified Genes

This example illustrates how it is possible to demonstrate involvementof the genes described in Example 1 in the biosynthesis of pristinamycinprecursors, and also to construct S. pristinaespiralis strains which areable to produce novel pristinamycins. These strains are obtained bydisrupting the genes which are involved in the biosynthesis of theresidue which it is desired to replace, and the novel pristinamycins areproduced by supplementing these mutants with novel precursors.

Strain SP92::pVRCC08, which is employed in the present invention toproduce novel derivatives of PI by replacing the precursor DMPAPA withother molecules, is described in Patent PCT/FR93/0923. It is obtained bydisrupting, by means of simple crossing over, the papA gene, which isinvolved in the biosynthesis of the precursor of DMPAPA and is thoughtto participate in an early step relating to the transamination ofchorismate. This disruption has a polar character since, in this mutant,expression of the papM gene (PCT/FR93/0923), which is situated 1.5 kbdownstream of the papA gene and is involved in the double methylation of4-amino-L-phenylalanine to form DMPAPA, is very reduced. Thus, assayingthe activity of the SAM-dependant methylation enzyme for converting4-amino-L-phenylalanine (PAPA) into DMPAPA indicates that mutantSP92::pVRC508 has an activity which is less than 5% of the activity ofthe wild-type strain.

In the present invention, this strain, SP92::pVRC508, can be used, underappropriate fermentation conditions and supplementation conditions, toproduce novel pristinamycins which are modified at the level of theDMPAPA residue, as will be explained in Example 3. Mutants having thesame phenotype can be obtained by disrupting the papB or papC genesdescribed in the present invention.

Another type of S. pristinaespiralis strain, whose pARA gene isdisrupted and which possesses the same phenotype as strainSP92::pVRC508, was obtained in a similar manner by disrupting the pa Agene by means of double crossing over. This construction was carried outstarting with a 4.6 kb SphI-HindIII fragment, which fragment wasisolated from cosmid pIBV2 and contains the 3′ region of the pipA gene,the entire snbF and papA genes and the 3′ part of the papC gene. Thisfragment was cloned into the suicide vector pDH5, which vector is onlyable to replicate in E. coli but carries a resistance marker which isexpressed in Streptomyces (the gene for resistance to thiostrepton or tonohiheptide, tsr). This vector, pDH5, was developed by Wohlebben et al(1991 Nucleic Acid Res. 19, 727-731). A BclI-BclI deletion of 1.1 kb wasthen made in the papA gene, and a 2.2 kb HindIII-HindIII fragment,carrying the amR gene (resistance to geneticin and to apramycin), wasintroduced after the cohesive ends had been filled in. The recombinantvector was termed pVRC414 and is depicted in FIG. 12. After transformingthe pristinamycin-producing strain with plasmid pVRC414, transformantswhich were resistant to geneticin and sensitive to thiostrepton wereisolated and analysed. These clones are the result of a doublehomologous recombination between the S. pristinaespiralis DNA regions ofplasmid pVRC414 and the corresponding chromosomal region of S.pristinaespiralis, as described in FIG. 13. One of these clones wastermed SP212. Its phenotype is identical to that of strain SP92::pVRC508as regards the absence of any production of PI and the ability of thestrain to produce new antibiotics in the presence of novel precursors.Advantageously, this type of strain, which is obtained by doublecrossing over, is more stable than the strains which are obtained bysimple crossing over.

2-1. Construction of a Mutant of S. pristinaespiralis SP92 Whose pipAGene is Disrupted.

This example illustrates how it is possible, by means of disrupting thepipA gene, to construct a strain of S. pristinaespiralis SP92 which nolonger produces PI under standard fermentation conditions and which isable to produce new pristinamycins, which are modified at the level ofthe 4-oxopipecolic acid residue of PIA, when novel precursors are addedto the fermentation.

It was constructed using a suicide vector, the vector pUC1318, whichonly replicates in E. coli. This vector does not carry any resistancemarker which is expressed in Streptomyces. Its presence in the genome ofStreptomyces can only be detected by colony hybridization.

2-1-1. Construction of Plasmid pVRC420

This example illustrates how it is possible to construct a plasmid whichdoes not replicate in S. pristinaespiralis SP92 and which can beemployed to disrupt the pipA gene by means of double homologousrecombination.

Plasmid pVRC420 was constructed in order to produce the chromosomalmutant of SP92 in which the pipA gene is disrupted, proceeding fromcosmid pIBV2, which is described in Patent PCT/FR93/0923. Cosmid pIBV2was cut with the restriction enzyme PstI and, after the fragments, thusgenerated, had been separated by electrophoresis on a 0.8% agarose gel,a 2.8 kb PstI-PstI fragment, containing the start of the snbA and snbFgenes and the whole of the pipA gene, was isolated and purified usingGeneclean (Bio101, La Jolla, Calif.). 50 ng of vector pUC1318, which hadbeen linearized by digesting with PstI, were ligated to 200 ng of the2.8 kb fragment, as described in Example 1. A clone carrying the desiredfragment was isolated following transformation of the strain TG1 andselection on LB+150 μg/ml ampicillin+X-gal+IPTG medium. The recombinantplasmid was termed pVRC415 (FIG. 8). A cassette containing the am^(R)gene, encoding resistance to apramycin or to geneticin (Kuhstoss et al.,1991), was then introduced into the unique HindIII site of plasmidpVRC415, this site being situated 530 bp downstream of the start of thepipA gene. This construction was effected as follows. A 2.5 kb DNAfragment, containing the am^(R) gene, the PermE promoter (Bibb et al.,1985) and the first 158 amino acids of the gene for resistance toerythromycin , ermE, was isolated by means of a SalI-BglII doubledigestion of a plasmid which was derived from plasmids pIJ4026 (plasmidcarrying the ermE gene under the control of the PermE promoter) andpHP45Ωam^(R). After filling in the SalI and BglII protruding 5′ cohesiveends using Klenow enzyme in accordance with the protocol described byManiatis et al., 1989, the fragment containing the am^(R) gene wascloned into the HindIII site of plasmid pVRC415, whose protruding 5′cohesive ends had also been filled in with Klenow enzyme as previouslydescribed. The recombinant plasmid thus obtained was designated pVRC420.Its restriction map is depicted in FIG. 9.

2-1-2. Isolation of Mutant SP92pipA::Ωam^(R), Whose PipA Gene isDisrupted by Homologous Recombination

This example illustrates how the mutant of S. piristinaespiralis SP92whose pipA gene is disrupted was constructed.

This mutant was isolated by transforming strain SP92 with the suicideplasmid pVRC420.

The preparation of protoplasts, their transformation and extraction ofthe total DNA from the recombinant strains were all effected asdescribed by Hopwood et al. (1985).

The strain SP92 was cultured, at 30° C. for 40 hours, in YEME medium(Hopwood et al., 1985), 34% sucrose, 5 mM MgCl₂ and 0.25% glycine. Themycelium was protoplasted in the presence of lysozyme, and 5×1 μg ofpVRC420 were used to transform (by the method employing PEG) theprotoplasts. After one night in which the protoplasts were regeneratedon R2YE medium (D. Hopwood et al. 1985), the recombinants were selectedby spreading on 3 ml of SNA medium (D. Hopwood et al. 1985) containing1,500 μg/ml geneticin.

100 clones which were resistant to geneticin were isolated from the 5transformations that were carried out. These recombinants arise fromintegration, by means of simple or double homologous recombinationbetween the pipA gene which is carried by the chromosome of strain SP92and the parts of the pipA gene which are contained in the 5.3 kbfragment carried by the suicide plasmid pVRC420. In order to select therecombinants which were obtained by double crossing over (that is whichdid not contain the pUC1318 part of plasmid pVRC420 in their genome),colony hybridizations were carried out on 90 clones using pUC19 labelledwith [α-³²p] dCTP as the probe, as described in Maniatis et al (1989).10 clones were selected which were resistant to geneticin but which didnot hybridize the vector pUC19. The spores of the recombinants wereisolated by streaking and growing on HT7 medium containing 10 μg/mlgeneticin, and restreaked on the same medium in order to obtain isolatedcolonies. In order to verify the position at which plasmid pVRC420 wasintegrated, various Southerns of the total DNA from several recombinantclones, purified as described by Hopwood et al. 1985, were carried out,with hybridization to the 2.8 kb PstI-PstI fragment, which was used as aprobe after having been labelled with [α-³²P] dCTP. The results confirmthat these recombinants were obtained by double crossing over betweenvector pVRC420 and the chromosome of strain SP92, resulting inreplacement of the 2.8 kb PstI-PstI fragment, containing the pipA gene,by a 5.3 kb PstI-PstI fragment containing the pipA gene which isdisrupted by introduction of the am^(R) gene. One of these mutants wasdesignated SP92pipA::Ωam^(R).

2-1-3. Production of Pristinamycins Using Mutant SP92pipA::Ωam^(R)

This example illustrates how it is established that the mutant of S.pristinaespiralis SP92 whose pipA gene is disrupted by integration ofplasmid pVR420 on the one hand no longer produces PI under standardfermentation conditions and on the other hand exhibits a high level ofproduction of a minor form of the B components of streptogramins inwhich 4-oxopipecolic acid is replaced by pipecolic acid.

Mutant SP92pipA::Ωam^(R), as well as strain SP92 in the role of acontrol strain, were cultured in liquid production medium. Thefermentation was carried out as follows: 0.5 ml of a suspension ofspores from the abovementioned strain are added, under sterileconditions, to 40 ml of inoculum medium in a 300 ml baffled Erlenmeyerflask. The inoculum medium is made up of 10 g/l corn steep, 15 g/lsucrose, 10 g/l (NH₄)₂SO₄, 1 g/l K₂HPO₄, 3 g/l NaCl, 0.2 g/l MgSO₄-7H₂Oand 1.25 g/l CaCO₃. The pH is adjusted to 6.9 using sodium hydroxidesolution before introducing the calcium carbonate. The Erlenmeyer flasksare shaken at 27° C. for 44 h on a rotating shaker at a speed of 325rpm. 2.5 ml of the previous culture, which is 44h old, are added understerile conditions to 30 ml of production medium in a 300 ml Erlenmeyerflask. The production medium is made up of 25 g/l soya flour, 7.5 g/lstarch, 22.5 g/l glucose, 3.5 g/l fodder yeast, 0.5 g/l zinc sulphateand 6 g/l calcium carbonate. The pH is adjusted to 6.0 with hydrochloricacid before introducing the calcium carbonate. The Erlenmeyer flasks areshaken for 24, 28 and 32 hours at 27° C. At each time point, 10 g ofmust are weighed into a smooth Erlenmeyer flask to which 20 ml of mobilephase, consisting of 34% of acetonitrile and 66% of a solution of 0.1 MKH₂PO₄ (adjusted to pH 2.9 with concentrated H₃PO₄) are added forextracting the pristinamycins. After shaking, the whole is centrifugedand the pristinamycins contained in the supernatant are assayed by HPLCby means of injecting 150 μl of the centrifugation supernatant onto aNucleosil 5-C8 column of 4.6×150 mm, which is eluted with a mixture of40% acetonitrile and 60% 0.1 M phosphate buffer, pH 2.9. The Ipristinamycins are detected by means of their UV absorbance at 206 nm.

The results demonstrated that, under the fermentation conditionsemployed, mutant SP92pipA::Ωam^(R) did not produce PI at 24, 28 or 32hrs of fermentation, while control strain SP92 produced a quantity of PIwhich was standard for the 3 times which were tested. The quantity ofPII which was produced remained the same for the two strains. MutantSP92pipA::Ωam^(R) is definitely blocked at a step in the biosynthesis ofPI. Fermentation complementation tests were carried out by addingdifferent precursors of PI, separately or together, to the culture inproduction medium after 16 hours. The results of these complementationsdemonstrated that when 100 mg/l pipecolic acid and 100 mg/l DMPAPA areadded simultaneously to the fermentation medium, the mutant produceswhat is normally a minor derivative of PI, i.e. PI_(E) (which isproduced by SP92 in a quantity which is less than 5%) at a level whichis equivalent to the production of PI_(A) by the control strain. Thisproduction does not take place if the pipecolic acid and the DMPAPA areadded separately. PI_(E) differs from PI_(A) (major component of PI) inthe absence of the keto function in the 4 position on the pipecolicacid. The fact that mutant SP92pipA::Ωam^(R) can only be complemented byadding pipecolic acid and DMPAPA simultaneously indicates that the papA,and probably the papB and papM genes were disrupted by a polar effect ofthe construct. Thus, all these genes are situated downstream of pipA andare probably cotranscripts together with pipA. Disruption of the lattertherefore leads to disruption of the pap genes and, consequently,absence of DMPAPA synthesis. The fact that complementation of mutantSP92pipA::Ωam^(R) with pipecolic acid results in the production ofPI_(E) and not PI_(A) leads to two conclusions: the first is thatconstruction of the PI cycle is achieved by incorporating pipecolic acidand not 4-oxopipecolic acid and that a hydroxylation generating the ketofunction in the 4 position then takes place subsequently. The second isthat this hydroxylation is probably carried out by the enzyme SnbF whosestructural gene is situated directly downstream of the pipA gene. Thus,the obvious polarity of the disruption of the pipA gene on the pap genesprobably involves a polar effect on the snbF gene, which is situatedbetween pipA and the pap genes, which is manifested in inhibition of thefunction of hydroxylation of the pipecolic acid residue of PI_(E) toform 4-hydroxypipecolic acid, which is found in PI_(F) and PI_(G) (FIG.2) and then oxidized to 4-oxopipecolic acid in PI_(A).

Preparing a mutant of this nature made it possible to construct a strainof S. pristinaespiralis which is unable to produce PI except in thepresence of the PI precursors DMPAPA and pipecolic acid, using which itis able to produce, in a quantity equivalent to that of the startingstrain, what is normally a minor derivative of PI within thepristinamycin mixture. Similarly, in the presence of novel precursors,or of a mixture of novel precursors and of precursors which are normallypresent in PI, this strain will be able to produce new pristinamycinswhich are modified in either DMPAPA or 4-oxopipecolic acid or in boththese residues.

2-2. Construction of a Mutant of S. pristinaespiralis SP92 Whose hpaAGene is Disrupted

This example illustrates how it is possible, by means of disrupting thehpaA gene, to construct a strain of S. pristinaespiralis SP92 which nolonger produces PI under standard fermentation conditions and which isable to produce new pristinamycins, which are modified at the level ofthe 3-HPA precursor, when novel precursors are added to thefermentation.

This mutant was constructed using a plasmid which does not replicate inS. pristinaespiralis SP92 and which can be used for disrupting the hpaAgene by means of double homologous recombination.

2-2-1. Construction of the Suicide Plasmid pVRC421

Plasmid pVRC421 was constructed using a suicide vector which, while onlybeing able to replicate in E. coli, carries a resistance marker which isexpressed in Streptomyces, i.e. the gene for resistance to thiostreptonor to nosiheptide, tsr. This vector, pDH5, was developed by Hillemann etal. (1991).

Plasmid pVRC421 was constructed in order to produce the chromosomalmutant of SP92 whose hpaA gene is disrupted, making use of cosmid pIBV2,which is described in Patent PCT/FR93/0923. pIBV2 was digested with therestriction enzyme SphI and, after having separated the fragments, thusgenerated, by means of electrophoresis on a 0.6% agarose gel, a 4.8 kbSphI-SphI fragment, containing the whole of the hpaA gene and virtuallythe whole of the snbA gene, was isolated and purified using Geneclean asdescribed above. 50 ng of the vector pDH5, linearized by digesting withSphI, were ligated to 200 ng of the 4.8 kb fragment, as subsequentlydescribed. A clone harbouring the desired fragment was isolated aftertransforming the strain TG1 and selecting on LB+150 μg/mlampicillin+IPTG+X-gal medium. The recombinant plasmid was designatedpVRC411 (FIG. 10). A cassette containing the gene am^(R), encodingresistance to apramycin or to geneticin, was then introduced into theunique PflmI site of plasmid pVRC411, this site being situated 610 bpdownstream of the start of the hpaA gene. This construct was produced asfollows. A 2.2 kb DNA fragment, containing the am^(R) gene, was isolatedfollowing digestion of the plasmid pHP45Ωam^(R), containing the am^(R)gene, with HindIII. After filling in the HindIII protruding 5′ cohesiveends using Klenow enzyme according to the protocol described by Maniatiset al. 1989, the fragment containing the am^(R) gene was cloned into thePflmI site of plasmid pVRC411, whose protruding 3′ cohesive ends hadbeen rendered blunt using the enzyme T4 polymerase as described inManiatis et al. 1989. The recombinant plasmid thus obtained was termedpVRC421. Its restriction map is depicted in FIG. 11.

2-2-2. Isolation of Mutant SP₉₂hpaA::Ωam^(R), Whose hpaA Gene isDisrupted by Means of Homologous Recombination

This example illustrates how the mutant of S. pristinaespiralis SP92whose hpaA gene is disrupted was constructed.

This mutant was isolated by transforming strain SP92 with the suicideplasmid pVRC421.

The protoplasts were prepared and transformed as described previously.

Strain SP92 was cultured, at 30° C. for 40 hours, in YEME medium, 34%sucrose, 5 mM MgCl₂, 0.25% glycine. The mycelium was protoplasted in thepresence of lysozyme, and 5×1 μg of pVRC421 were employed fortransforming (by the method using PEG) the protoplasts. After one nightfor regenerating the protoplasts on R2YE medium, the recombinants wereselected by spreading on 3 ml of SNA medium containing 1,500 μg/mlgeneticin.

600 clones which were resistant to geneticin were isolated from the 5transformations which were carried out. These recombinants result fromintegration by means of simple or double homologous recombinationbetween the hpaA gene carried by the chromosome of strain SP92 and the 6kb fragment of the suicide plasmid pVRC421. In order to select therecombinants obtained by double crossing over (that is, the clones whichno longer contain, in their genome, the pDH5 moiety of plasmid pVRC421),the clones were subcultured on HT7 medium containing 400 μg/mlthiostrepton. 6 clones which were resistant to geneticin but sensitiveto thiostrepton were selected. The spores of the recombinants wereselected by streaking and growth on HT7 medium containing 10 μg/mlgeneticin, and restreaked on the same medium in order to obtain isolatedcolonies. In order to verify the position of integration of plasmidpVRC421, various Southerns of the total DNA from the 6 recombinantclones, purified as described by Hopwood et al. 1985, were carried outwith hybridization to the 4.8 kb SphI-SphI fragment, which was used asthe probe after having been labelled with [α-³²P]dCTP. The resultsconfirm that these recombinants were obtained by double crossing overbetween the vector pVRC421 and the chromosome of the SP92 strain,resulting in replacement of the 4.8 kb SphI-SphI fragment, containingthe hpaA gene, by a 6 kb SphI-SphI fragment which contains the hpaA genedisrupted by the am^(R) gene. One of these mutants was designatedSP₉₂hpaA::Ωam^(R).

2-2-3. Production of Pristinamycins by Mutant SP92hpaA::Ωam^(R).

This example illustrates how it is established that the mutant of S.pristinaespiralis SP92 whose hpaA gene is disrupted by integration ofplasmid pVR421 no longer produces PI under the standard fermentationconditions.

Mutant SP92hpaA::Ωam^(R), and also strain SP92 in the role of controlstrain, were cultured in liquid production medium. The fermentation wascarried out as described in Example 2-1-3, and the pristinamycins werethen extracted and assayed as previously described. The resultsdemonstrated that, under the fermentation conditions employed, mutantSP92hpaA::Ωam^(R) did not produce PI, either at 24, 28 or 32 hrs offermentation, whereas the control strain produced a quantity of PI whichwas standard for the 3 time points tested. The quantity of PII producedremained the same for the two strains. Mutant SP92hpaA::Ωam^(R) isdefinitely blocked at a step in the biosynthesis of PI. Complementaryfermentation tests were carried out by adding different precursors ofPI, separately or together, to the culture in production medium after 16hours. When 100 mg/l 3-hydroxypicolinic acid are added to thefermentation medium, the mutant then produces PI_(A) at a level which isequivalent to the production of PI by the control strain. The fact thatmutant SP92hpaA::Ωam^(R) can only be complemented by adding3-hydroxypicolinic acid demonstrates that the hpaA gene is involved inthe synthesis of this precursor.

Construction of this mutant made it possible to produce a strain of S.pristinaespiralis which is mutated as regards its production of PI butwhich, in the presence of the precursor 3-HPA, is capable of producingPI in a quantity equivalent to that produced by the starting strain. Inthe same way as in the preceding examples, it can be envisaged that itshould be possible, using a mutant of this nature in the presence ofnovel precursors, to produce new pristinamycins which are modified atthe level of the 3-hydroxypicolinic acid residue.

EXAMPLE 3 Production of Compounds of the General Formula I by the MutantSP92::pVRC508

This example illustrates how the mutant of S. pristinaespiralis SP92whose papA gene is disrupted by integration of plasmid pVRC508 is ableto synthesize new streptogramins in the presence of precursors which areadded to the production medium. These precursors can be derivatives ofamino acids and, more particularly, of phenylalanine, but also ofα-ketocarboxylic acids and, more particularly, of phenylpyruvic acid.

The mutant SP92::pVRC508 was cultured in liquid production medium. Thefermentation was carried out as follows: 0.5 ml of a suspension ofspores from the previously mentioned strain is added, under sterileconditions, to 40 ml of inoculum medium in a 300 ml baffled Erlenmeyerflask. The inoculum medium is made up of 10 g/l corn steep, 15 g/lsucrose, 10 g/l (NH₄)₂SO₄, 1 g/l K₂HPO₄, 3 g/l NaCl, 0.2 g/l MgSO₄-7H₂Oand 1.25 g/l CaCO₃. The pH is adjusted to 6.9 with sodium hydroxidesolution before introducing the calcium carbonate. The Erlenmeyer flasksare shaken at 27° C. for 44 h on a rotating shaker at a speed of 325rpm. 2.5 ml of the previous culture, which is 44 h old, are added, understerile conditions, to 30 ml of production medium in a 300 ml Erlenmeyerflask. The production medium consists of 25 g/l soya flour, 7.5 g/lstarch, 22.5 g/l glucose, 3.5 g/l fodder yeast, 0.5 g/l zinc sulphateand 6 g/l calcium carbonate. The pH is adjusted to 6.0 with hydrochloricacid before introducing the calcium carbonate. The Erlenmeyer flasks areshaken at 27° C. on a rotating shaker at a speed of 325 rpm. After 16 h,1 ml of a solution of one of the precursors listed in Table 3 (generally5 or 10 g/l) is added to the culture. The latter is terminated 8 or 24 hlater. The volume of the must is measured immediately, and 2 volumes ofmobile phase, consisting of 34% acetonitrile and 66% of a solution of 50.1 m KH₂PO₄ (adjusted to pH 2.9 with concentrated H₃PO₄) are added toit for extracting the pristinamycins. After shaking, the whole iscentrifuged and the pristinamycins contained in the supernatant areextracted and purified as described in Example 4. They are also assayedby HPLC by means of injecting 150 μl of the centrifugation supernatantonto a Nucleosil 5-C8 4.6×150 mm column, which is eluted with a mixtureof 40% acetonitrile and 60% 0.1 M phosphate buffer, pH 2.9. The new Ipristinamycins are detected by means of their absorbance at 206 nm and,where appropriate, by means of their fluorescence emission (370 nmfilter, excitation at 306 nm).

TABLE III PRECURSOR ORIGIN phenylalanine Janssen4-dimethylaminophenylalanine Example 33 4-methylaminophenylalanineExample 34-1 4-aminophenylalanine Janssen 22.794.964-diethylaminophenylalanine Example 33 4-ethylaminophenylalanine Example33 4-methylthiophenylalanine Example 33 4-methylphenylalanineJ.P.S101-312-4/ Example 33 4-methoxyphenylalanine Janssen 16.975.974-trifluoromethoxyphenylalanine Example 34-84-methoxycarbonylphenylalanine Example 33 4-chlorophenylalanine Janssen15.728.14 4-bromophenylalanine Janssen 22.779.81 4-iodophenylalanineBachem F 1675 4-trifluoromethylphenylalanine P.C.R. Inc. 12 445-34-tert-butylphenylalanine Example 35-1 4-isopropylphenylalanine Example36-1 3-methylaminophenylalanine Example 35-3 3-methoxyphenylalanineJ.P.S. 101-313-2 3-methylthiophenylalanine Example 34-113-fluoro-4-methylphenylalanine Example 34-5 4-tert-butylphenylpyruvicacid Example 33 4-methylaminophenylpyruvic acid Example 34-42-napthylphenylalanine Bachem F 1865 4-fluorophenylalanine Bachem F 15353-fluorophenylalanine Bachem F 2135 3-ethoxyphenylalanine Example 37-12,4-dimethylphenylalanine Example 33 3,4-dimethylphenylalanine Example33 3-methylphenylalanine Example 33 4-phenylphenylalanine Example 334-butylphenylalanine Example 36-3 2-thienyl-3-alanine Aldrich 28.726.83-trifluoromethylphenylalanine Example 33 3-hydroxyphenylalanine AldrichT 9.039.5 3-ethylaminophenylalanine Example 35-64-aminomethylphenylalanine Example 33 4-allylaminophenylalanine Example38-2 4-diallylaminophenylalanine Example 38-14-allylethylaminophenylalanine Example 39-44-ethylpropylaminophenylalanine Example 39-64-ethylisopropylaminophenylalanine Example 39-14-ethylmethylcyclopropylamino- Example 39-8 phenylalanine4-(1-pyrrolidinyl)phenylalanine Example 40-1 4-O-allyltyrosine Example33 4-O-ethyltyrosine Example 33 4-ethylthiophenylalanine Example 334-ethylthiomethylphenylalanine Example 41-1 4-O-(2-chloroethyl)tyrosineExample 42-1 4-acetylphenylalanine Example 33 4-ethylphenylalanineExample 33 3-dimethylaminophenylalanine Example 35-10

The following table (TABLE IV) indicates the relative retention times ofthe new PI's which are produced, taking PIA as the reference. Theabsolute retention times were determined at 25° C. in the HPLC systemdescribed above; they vary slightly from one injection to another andalso in accordance with temperature.

TABLE IV t_(R) (relative retention time) of the new PI (Neo PI) OtherPrecursor Neo PI_(A) Neo PI_(H) neo PI 4-methylaminophenylalanine 0.854-aminophenylalanine 0.64 4-methylthiophenylalanine 1.93 2.73 1.634-methylphenylalanine 1.77 2.65 4-methoxyphenylalanine 1.464-methoxycarbonylphenyl- 1.49 alanine 4-chlorophenylalanine 2.044-bromophenylalanine 2.16 4-iodophenylalanine 2.424-trifluoromethylphenyl- 2.56 3.74 alanine 4-tert-butylphenylalanine3.34 4-isopropylphenylalanine 2.80 4.35 3-methylaminophenylalanine 1.153-methoxyphenylalanine 1.49 2.04 3-fluoro-4- 2.93 methylphenylalanine4-tert-butylphenylpyruvic 3.34 acid 4-methylaminophenylpyruvic 0.85 acid4-ethylaminophenylalanine 0.94 4-diethylaminophenylalanine 0.614-allylaminophenylalanine 1.83 4-diallylaminophenylalanine 2.644-allylethylaminophenyl- 2.4 alanine 4-ethylpropylaninophenyl- 1.06alanine 4-ethylisopropylamino- 0.89 phenylalanine4-ethylmethylcyclopropyl- 1.1 aminophenylalanine4-(1-pyrrolidinyl)phenyl- 2.0 alanine 4-O-trifluoromethyltyrosine 2.424-O-allyltyrosine 2.62 4-O-ethyltyrosine 2.2 4-ethylthiophenylalanine1.96 4-methylthiomethylphenyl- 1.98 alanine 4-O-(2-chloroethyl)tyrosine2.45 4-acetylphenylalanine 1.61 4-ethylphenylalanine 1.86 2.403-dimethylaminophenyl- 1.49 alanine 3-methylthiophenylalanine 1.933-O-ethyltyrosine 1.78

The new PI, with a t_(R) of 4.35, for 4-isopropylphenylalaninecorresponds to a neo PI_(E) which is described in Example 14.

The new PI, with a t_(R) of 1.63, for 4-methylthiophenylalaninecorresponds to a 5γ-hydroxy neo PI_(H), which is described in Example 5.

The mutant SP92::pVRC508 was otherwise fermented in the presence of4-dimethylaminophenylalanine. Under these conditions of complementation,mutant SP92::pVRC508 produces a quantity of I_(A) pristinamycins whichis equivalent to that produced by strain SP92.

EXAMPLE 4 Preparation of pristinamycin I_(B)[4ζ-methylamino-de(4ζ-dimethylamino)pristinamycin I_(A)] and of4ζ-amino-de(4ζ-dimethylamino)pristinamycin I_(A) 4.1: Preparation ofpristinamycin I_(B) [4ζ-methylamino-de) 4ζ-dimethylamino)pristinamycinI_(A)]

The strain SP92::pVRC508 is cultured in production medium, using 60Erlenmeyer flasks as described in Example 3, with 1 ml of a 10 g/laqueous solution of (R,S)-4-methylaminophenylalanine, synthesized as inExample 34-1, being added at 16 h. At the end of 40 h of culture, the1.8 liters of must recovered from the 60 Erlenmeyer flasks are extractedwith 2 volumes of a mixture consisting of 66% 100 mM phosphate buffer,pH 2.9, and 34% acetonitrile, and then centrifuged. The supernatant isextracted with 2 times 0.5 volumes of dichloromethane. Thechloromethylene phases are washed with water and then combined, driedover sodium sulphate and evaporated. The dry extract is taken up in 20ml of dichloromethane and injected onto a silica (30 g) column which ismounted in dichlormethane and is successively eluted with plateaus offrom 0 to 10% methanol in dichloromethane. The fractions containingpristinamycin I_(B) are combined and evaporated. The dry residue istaken up in 6 ml of a mixture of 65% water and 35% acetonitrile andinjected onto a semi-preparative Nucleosil 7μ C8 10×250 mm column(Macherey Nagel), which is eluted with a mixture of 65% 100 mM phosphatebuffer, pH 2.9, and 35% acetonitrile. The fractions containingpristinamycin I_(B) are combined and extracted with one volume ofdichloromethane. The organic phase is washed with water, dried on sodiumsulphate and then evaporated. 52 mg of pristinamycin I_(B) are obtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.71 (dd, J=16and 6 Hz, 1H, 5 β₂), 0.92 (t, J=7.5 Hz, 3H: CH₃ 2 γ), from 1.10 to 1.40(mt, 2H: 3 β₂ and 3 γ₂), 1.34 (d, J=7.5 Hz, 3H: CH₃ 1 γ), from 1.50 to1.85 (mt, 3H: 3 γ₁ and CH₂ 2 β), 2.03 (mt, 1H, 3 β₁), 2.22 (mt, 1H, 5δ₂), 2.33 (broad d, J=16 Hz, 1H: 5 δ₁), 2.40 (d, J=16 Hz, 1H: 5 β₁),2.82 (mt, 1H: 5 ε₂), 2.81 (s, 3H: 4 NCH₃ in the para position of thephenyl), 2.90 (dd, J=12 and 4 Hz, 1H: 4 β₂), 3.29 (s, 3H: 4 NCH₃) from3.20 to 3.45 and 3.60 (2 mts, 1H each: CH₂ 3 δ), 3.40 (t, J=12 Hz, 1H: 4β₁), 4.57 (dd, J=7 and 8 Hz, 1H, 3 α), 4.75 (broad dd, J=13 and 7 Hz,1H: 5 ε₁), 4.83 (mt, 1H: 2α), 4.89 (broad d, J=10 Hz, 1H: 1α), 5.24 (dd,J=12 and 4 Hz, 1H: 4 α), 5.32 (broad d, J=6 Hz, 1H: 5 α), 5.89 (d, J=9Hz, 1H: 6 α), 5.90 (broad q, J=7.5 Hz, 1H: 1β), 6.53 (d, J=9 Hz, 1H: NH2), 6.53 (d, J=8 Hz, 2H: 4ε), 7.03 (d, J=8 Hz, 2H: 4δ), from 7.10 to7.35 (mt, 5H: aromatic H 6), 7.46 (mt, 2H: 1′H₅ and 1′H₄), 7.85 (dd,J=5.5 and 2 Hz, 1H: 1′H₆), 8.44 (d, J=10 Hz, 1H: NH 1), 8.76 (d, J=9 Hz,1H: NH 6), 11.63 (s, 1H: OH).

4.2: Preparation of 4ζ-amino-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium, using 60Erlenmeyer flasks as described in Example 3, with 1 ml of a 5 g/laqueous solution of (S)-4-aminophenylalanine being added at 16 h. At theend of 40 h of culture, the 1.8 liters of must recovered from the 60Erlenmeyer flasks are extracted with 2 volumes of a mixture consistingof 66% 100 mM phosphate buffer, pH 2.9 and 34% acetonitrile, and thencentrifuged. The supernatant is extracted with 2 times 0.5 volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and is elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing the new derivative of pristinamycin I_(A) arecombined and evaporated. The dry residue is taken up in 6 ml of amixture consisting of 65% water and 35% acetonitrile and injected onto asemi-preparative Nucleosil 7μ C8 10×250 mm column (Macherey Nagel),which is eluted with a mixture consisting of 65% 100 mM phosphatebuffer, pH 2.9, and 35% acetonitrile. The fractions containing the newpristinamycin are combined and extracted with one volume ofdichloromethane. The organic phase is washed with water, dried oversodium sulphate and then evaporated. 5 mg of4ζ-amino-de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.72 (dd, J=16and 5.5 Hz, 1H, 5 β₂), 0 90 (t, J=7.5 Hz, 3H: CH₃ 2 γ), from 1.10 to1.40 (mt, 2H: 3 β₂ and 3 γ₂), 1.33 (d, J=7.5 Hz, 3H: CH₃ 1 γ), from 1.50to 1.85 (mt, 3H: 3 γ₁ and CH₂ 2 β), 2.02 (mt, 1H, 3 β₁), 2.19 (mt, 1H, 5δ₂), 2.33 (broad d, J=16 Hz, 1H: 5 δ₁), 2.42 (d, J=16 Hz, 1H: 5 β₁),2.81 (dt, J=13 and 4 Hz, 1H: 5 ε₂), 2.90 (dd, J=12 and 4 Hz, 1H: 4 β₂),3.24 (s, 3H: NCH₃ 4), from 3.20 to 3.40 and 3.54 (2 mts, 1H each: CH₂ 3δ), 3.30 (t, J=12 Hz, 1H: 4 β₁), 3.72 (unres.comp., 2H: ArNH₂), 4.54(dd, J=7.5 and 7 Hz, 1H, 3 α), 4.73 (broad dd, J=13 and 8 Hz, 1H: 5 ε₁),4.82 (mt, 1H: 2α), 4.89 (broad d, J=10 Hz, 1H: 1α), 5.22 (dd, J=12 and 4Hz, 1H: 4 α), 5.32 (broad d, J=5.5 Hz, 1H: 5 α), 5.89 (mt, 2H: 6 α and1β), 6.51 (d, J=9.5 Hz, 1H: NH 2), 6.61 (d J=8 Hz, 2H: 4ε), 6.98 (d, J=8Hz, 2H: 4δ), from 7.15 to 7.35 (mt, 5H: aromatic H 6), 7.45 (dd, J=8.5and 1.5 Hz, 1H: 1′H₄), 7.48 (dd, J=8.5 and 4 Hz, 1H: 1′H₅), 7.82 (dd,J=4 and 1.5 Hz, 1H: 1′H₆), 8.43 (d, J=10 Hz, 1H: NH 1), 8.76 (d, J=9.5Hz, 1H: NH 6), 11.63 (S, 1H: OH).

EXAMPLE 5 Preparation of 4ζ-methylthio-de(4ζ-dimethylamino)pristinamycinI_(A), of 4ζ-methylthio-de(4ζ-dimethylamino)pristinamycin I_(H) and of5-γ-hydroxy-4ζ-methylthio-de(4-dimethylamino)pristinamycin I_(H)

Strain SP92::pVRC508 is cultured in production medium using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 10 g/lsolution of (R,S)-4-methylthiophenylalanine, synthesized as in Example33, in 0.1N sodium hydroxide solution being added at 16 h. At the end of40 h of culture, the 1.8 liters of must recovered from the 60 Erlenmeyerflasks are extracted with 2 volumes of a mixture consisting of 66% 100mM phosphate buffer, pH 2.9, and 34% acetonitrile, and then centrifuged.The supernatant is extracted with 2 times 0.5 volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and is elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing the new derivative of pristinamycin I_(A) arecombined and evaporated. 65 mg of dry residue are obtained. This istaken up in 6 ml of a mixture consisting of 60% water and 40%acetonitrile and injected in two batches onto a semi-preparativeNucleosil 7μ C8 10×250 mm column (Macherey Nagel), which is eluted witha mixture consisting of 55% 100 mM phosphate buffer, pH 2.9, and 45%acetonitrile. The fractions containing the new pristinamycin arecombined and extracted with one volume of dichloromethane. The organicphase is washed with water, dried over sodium sulphate and thenevaporated. 45 mg of 4ζ-methylthio-de(4ζ-dimethylamino)pristinamycinI_(A) are obtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.68 (dd, J=16and 5.5 Hz, 1H 5 β₂), 0.93 (t, J=7.5 Hz, 3H: CH₃, 2 γ), 1.13 (mt, 1H: 3β₂), from 1.25 to 1.40 (mt, 1H: 3 γ₂), 1.33 (d, J=7.5 Hz, 3H: CH₃ 1 γ),from 1.55 to 1.85 (mt, 3H: 3 γ₁, and CH₂ 2 β), 2.02 (mt, 1H, 3 β₁), 2.18(mt, 1H, 5 δ₂), 2.38 (broad d, J=16.5 Hz, 1H: 5 δ₁), 2.46 (s, 3H: SCH₃),2.48 (d, J=16 Hz, 1H, 5 β₁), 2.85 (dt, J=13.5 and 4 Hz, 1H: 5 ε₂), 3.00(dd, J=12 and 5 Hz, 1H: 4 β₂), 3.23 (s, 3H: NCH₃, 4), 3.37 (t, J=12 Hz,1H: 4 β₁), 3.37 and 3.58 (2 mts, 1H each: CH₂ 3 δ), 4.55 (t, J=7.5 Hz,1H, 3 α), 4.77 (broad dd, J=13.5 and 8 Hz, 1H: 5 ε₁), 4.86 (mt, 1H: 2α),4.89 (dd, J=10 and 1.5 Hz, 1H: 1α), 5.30 (broad d, J=5.5 Hz, 1H: 5 α),5.32 (dd, J=12 and 5 Hz, 1H: 4 α), 5.90 (d, J=9.5 Hz, 1H: 6 α), 5.92(dq, J=7.5 and 1.5 Hz, 1H: 1β), 6.55 (d, J=9.5 Hz, 1H: NH 2), 7.13 (d,J=8 Hz, 2H: 4δ), from 7.15 to 7.35 (mt, 5H: aromatic H 6), 7.19 (d, J=8Hz, 2H: 4ε), 7.45 (mt, 2H: 1′H₄ and H₅), 7.76 (t, J=5 Hz, 1′H₆), 8.42(d, J=10 Hz, 1H: NH 1), 8.76 (d, J=9.5 Hz, 1H: NH 6), 11.65 (s, 1H: OH).

Using the fractions derived from the silica column described above whichcontain the novel derivative of pristinamycin I_(H), 10 mg of4ζ-methylthio-de(4ζ-dimethylamino)pristinamycin I_(H) are isolated bymeans of semi-preparative column chromatography as described above butbringing the proportion of acetonitrile in the eluent phase to 50%.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.32 (mt, 1H, 5β₂), 0.93 (t, J=7.5 Hz, 3H: CH₃ 2 γ), from 1.20 to 1.35 (mt, 2H: 3 β₂and 3 γ₂), 1.30(d, J=7.5 Hz, 3H: CH₃ 1 γ), from 1.35 to 2.05 (mt, 9H: 3γ₁-3 β₁-CH₂ 2 β-CH₂ 5 δ-CH₂ 5γ and 5 β₁), 2.44 (dt, J=13.5 and 1.5 Hz,1H: 5 ε₂), 2.49 (s,3H: SCH₃), 2.99 (dd, J=12 and 5 Hz, 1H: 4 β₂), 3.09(dd, J=12.5 and 12 Hz, 1H: 4 β₁), 3.54 and 3.64 (2 mts, 1H each: CH₂ 3δ), 4.17 (dd, J=7 and 6 Hz, 1H: 3 α), 4.49 (broad d, J=13.5 Hz: 1H: 5ε₁), from 4.70 to 4.80 (mt, 3H: 2α-5 α and 4 α), 4.84 (dd, J=10 and 1.5Hz, 1H: 1α), 5.51 (d, J=7 Hz, 1H: 6 α), 5.73 (mt, 1H: 1β), 6.65 (d,J=9.5 Hz, 1H: NH 2), 7.10 (d, J=8 Hz, 2H: 4δ), 7.22 (d, J=8 Hz, 2H: 4ε),from 7.20 to 7.40 (mt, 7H: aromatic H 6=1′H₄ and 1′H₅), 7.87 (d, J=4 Hz,1H: 1′H₆), 8.55 (unres.comp., 1H: NH 6), 8.55 (d, J=10 Hz, 1H: NH 1),11.70 (s, 1H: OH).

Using the fractions derived from the silica column described above whichcontain the novel derivative of pristinamycin I, 3 mg of5γ-hydroxy-4ζ-methylthio-de(4ζ-dimethylamino)pristinamycin I_(H) areisolated by carrying out semi-preparative column chromatography asdescribed above and maintaining the proportion of acetonitrile in theeluent phase at 45%.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): a markedlypreponderant isomer is observed: the —OH in the 5 γ position in an axialposition. 0.37 (d mt, J=16 Hz, 1H, 5 β₂), 0.93 (t, J=7.5 Hz, 3H: CH₃ 2γ), from 1.20 to 1.45 (mt, 2H: 3 β₂ and 3 γ₂), 1.31 (d, J=7.5 Hz, 3H:CH₃ 1 γ), from 1.40 to 1.85 (mt, 5H: 3 γ₁-CH₂ 2 β and CH₂ 5 δ), 1.98(mt, 1H, 3 β₁), 2.17 (d, J=16 Hz, 1H: 5 β₁), 2.50 (s, 3H: SCH₃), 2.77(dt, J=13.5 and 2 Hz, 1H: 5 ε₂), 2.99 (dd, J=12 and 4 Hz, 1H: 4 β₂),3.11 (t, J=12 Hz, 1H: 4 β₁), from 3.45 to 3.70 (mt, 2H: CH₂ 3 δ), 3.73(mt, 1H: 5 γ in an equatorial position), 4.13 (t, J=7 Hz, 1H, 3 α), 4.37(broad d, J=13.5 Hz, 1H: 5 ε₁), from 4.75 to 4.95 (mt, 3H: 2α, 4 α and 5α), 4.89 (dd, J=10 and 1 Hz, 1H: 1α), 5.70 (d, J=8 Hz, 1H: 6 α), 5.80(dq, J=7.5 and 1 Hz, 1H: 1β), 6.37 (d, J=5 Hz, 1H: NH 4), 6.71 (d, J=10Hz, 1H: NH 2), 7.10 (d, J=8 Hz, 2H: 4δ), 7.22 (d, J=8 Hz, 2H: 4 ε), from7.20 to 7.40 (mt, 5H: aromatic H 6), 7.43 (dd, J=8.5 and 1.5 Hz, 1H:1′H₄), 7.46 (dd, J=8.5 and 4 Hz, 1H: 1′H₅), 7.89 (dd, J=4 and 1.5 Hz,1H: 1′H₆), 8.55 (d, J=10 Hz, 1H: NH 1), 9.15 (d, J=8 Hz, 1H: NH 6),11.70 (8, 1H: OH).

EXAMPLE 6 Preparation of 4ζ-methyl-de(4ζ-dimethylamino)pristinamycinI_(A) and of 4ζ-methyl-de(4ζ-dimethylamino)pristinamycin I_(H)

Strain SP92::pVRC508 is cultured in production medium, using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 5 g/lsolution of (R,S)-4-methylphenylalanine in 0.1 N sodium hydroxidesolution being added at 16 h. At the end of 40 h of culture, the 1.8liters of must recovered from the 60 Erlenmeyer flasks are extractedwith 2 volumes of a mixture consisting of 66% 100 mM phosphate buffer,pH 2.9, and 34% acetonitrile, and then centrifuged. The supernatant isextracted with 2 times 0.5 volumes of dichloromethane. Thechloromethylene phases are washed with water and then combined, driedover sodium sulphate and evaporated. The dry extract is taken up in 20ml of dichloromethane and injected onto a silica (30 g) column which ismounted in dichloromethane and is eluted successively with plateaus offrom 0 to 10% methanol in dichloromethane. The fractions containing thenew derivative of pristinamycin I_(A) are combined and evaporated. 49 mgof dry residue are obtained. This residue is taken up in 6 ml of amixture consisting of 60% water and 40% acetonitrile and injected, intwo batches, onto a semi-preparative Nucleosil 7μ C8 10×250 mm column(Macherey Nagel), which is eluted with a mixture consisting of 55% 100mM phosphate buffer, pH 2.9, and 45% acetonitrile. The fractionscontaining the new pristinamycin are combined and extracted with onevolume of dichloromethane. The organic phase is washed with water, driedover sodium sulphate and then evaporated. 44 mg of4ζ-methyl-de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.52 (dd, J=16and 6 Hz, 1H, 5 β₂), 0.93 (t, J=7.5 Hz, 3H: CH₃ 2 γ), 1.15 (mt, 1H: 3β₂), from 1.20 to 1.40 (mt, 1H: 3 γ₂), 1.35 (d, J=7.5 Hz, 3H: CH₃ 1 γ),from 1.50 to 1.85 (mt, 3H: 3 γ₁ and CH₂ 2 β), 2.04 (mt, 1H, 3 β₁), 2.18(mt, 1H, 5 δ₂), from 2.25 to 2.45 (mt, 2H: 5 δ₁ and 5 β₁), 2.36 (s, 3H:ArCH₃), 2.83 (dt, J=13 and 4 Hz, 1H: 5 ε₂), 2.99 (dd, J=13 and 4 Hz, 1H:4 β₂), 3.28 (s, 3H: NCH₃4), 3.31 and 3.59 (2 mts, 1H each: CH₂ 3 δ),3.40 (t, J=13 Hz, 1H: 4 β₁), 4.59 (t, J=7.5 Hz, 1H, 3 α), 4.74 (broaddd, J=13 and 7 Hz, 1H: 5 ε₁), 4.85 (mt, 1H: 2α), 4.89 (broad d, J=10 Hz,1H: 1α), from 5.25 to 5.35 (mt, 2H: 5 α and 4 α), from 5.85 to 5.95 (mt,2H: 6 α and 1β), 6.52 (d, J=9.5 Hz, 1H: NH 2), 7.14 (AB limit, J=9 Hz,4H: 4δ and 4ε), from 7.15 to 7.35 (mt, 5H: aromatic H 6), 7.50 (mt, 2H:1′H₄ and 1′H₅), 7.81 (dd, J=4 and 2 Hz, 1H: 1′H₆), 8.41 (d, J=10 Hz, 1H:NH 1), 8.74 (d, J=9 Hz, 1H: NH 6), 11.63 (s, 1H:OH).

Using the fractions derived from the silica column described above whichcontain the new derivative of pristinamycin I_(H), 21 mg of4ζ-methyl-de(4ζ-dimethylamino)pristinamycin I_(H) (mass spectrometry:M+H⁺=810) are isolated by carrying out semi-preparative columnchromatography as described above.

EXAMPLE 7 Preparation of 4ζ-methoxy-de(4ζ-dimethylamino)pristinamycinI_(A)

Strain SP92::pVRC508 is cultured in production medium using 12Erlenmeyer flasks, as described in Example 3, with 1 ml of a 5 g/lsolution of (RS)-4-methoxyphenylalanine in 0.1 N sodium hydroxidesolution being added at 16 h. At the end of 40 h of culture, the 0.35liters of must recovered from the 12 Erlenmeyer flasks is extracted with2 volumes of a mixture consisting of 66% 100 mM phosphate buffer, pH2.9, and 34% acetonitrile, and then centrifuged. The supernatant isextracted with 2 times 0.5 volumes of dichloromethane. Thechloromethylene phases are washed with water and then combined, driedover sodium sulphate and evaporated. The dry extract is taken up in 20ml of dichloromethane and injected onto a silica (30 g) column which ismounted in dichloromethane and is eluted successively with plateaus offrom 0 to 10% methanol in dichloromethane. The fractions containing thenew derivative of pristinamycin I_(A) are combined and evaporated. 14 mgof dry residue are obtained. This residue is taken up in 3 ml of amixture consisting of 60% water and 40% acetonitrile and injected onto asemi-preparative Nucleosil 7μ C8 10×250 mm column (Machery Nagel), whichis eluted with a mixture consisting of 60% 100 m phosphate buffer, pH2.9, and 40% acetonitrile. The fractions containing the newpristinamycin are combined and extracted with one volume ofdichloromethane. The organic phase is washed with water, dried oversodium sulphate and then evaporated. 12 mg of4ζ-methoxy-de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, d in ppm, ref. TMS): 0.63 (dd, J=16and 5.5 Hz, 1H, 5 β₂), 0.96 (t, J=7.5 Hz, 3H: CH₃ 2 γ), 1.17 (mt, 1H: 3β₂), from 1.30 to 1.45 (mt, 1H: 3 γ₂), 1.38 (d, J=7.5 Hz, 3H: CH₃ 1 γ)from 1.55 to 1.85 (mt, 3H: 3 γ₁ and CH₂ 2 β), 2.05 (mt, 1H, 3 β₁), 2.20(mt, 1H, 5 δ₂), 2.40 (broad d, J=16 Hz, 1H: 5 δ₁), 2.47 (d, J=16 Hz, 1H:5 β₁), 2.88 (dt, J=13 and 4 Hz, 1H: 5 ε₂), 2.99 (dd, J=12.5 and 5 Hz,1H: 4 β₂), 3.30 (s, 3H: NCH₃ 4), 3.32 and 3.60 (2 mts, 1H each: CH₂ 3δ), 3.40 (t, J=12.5 Hz, 1H: 4 β₁), 3.80 (s, 3H: OCH₃), 4.60 (t, J=7.5Hz, 1H, 3 α), 4.80 (broad dd, J=13 and 8.5 Hz, 1H: 5 ε₁), 4.88 (mt, 1H:2α), 4.92 (broad d, J=10 Hz, 1H: 1α), 5.31 (dd, J=12.5 and 5 Hz, 1H: 4α), 5.34 (broad d, J=5.5 Hz, 1H: 5 α), 5.90 (d, J=9 Hz, 1H: 6 α), 5.93(broad q, J=7.5 Hz, 1H: 1β), 6.54 (d, J=9 Hz, 1H: NH 2), 6.87 (d, J=8Hz, 2H: 4ε), 7.16 (d, J=8 Hz, 2H: 4δ), from 7.15 to 7.40 (mt, 5H:aromatic H 6), 7.50 (mt, 2H: 1′H₅ and 1′H₄), 7.80 (dd, J=4 and 2.5 Hz,1H: 1′H₆), 8.43 (d, J=10 Hz, 1H: NH 1), 8.78 (d, J=9 Hz, 1H: NH 6),11.65 (s, 1H:OH).

EXAMPLE 8 Preparation of4ζ-methoxycarbonyl-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 10 g/lsolution of (R,S)-4-methoxycarbonylphenylalanine, synthesized as inExample 33, being added at 16 h. At the end of 24 h of culture, the 1.8liters of must recovered from the 60 Erlenmeyer flasks are extractedwith 2 volumes of a mixture consisting of 66% 100 mM phosphate buffer,pH 2.9, and 34% acetonitrile, and then centrifuged. The supernatant isextracted with 2 times 0.5 volumes of dichloromethane. Thechloromethylene phases are washed with water and then combined, driedover sodium sulphate and evaporated. The dry extract is taken up in 20ml of dichloromethane and injected onto a silica (30 g) column which ismounted in dichloromethane and is eluted successively with plateaus offrom 0 to 10% methanol in dichloromethane. The fractions containing thenew derivative of pristinamycin I_(A) are combined and evaporated. 14 mgof dry residue are obtained. This residue is taken up in 3 ml of amixture consisting of 60% water and 40% acetonitrile and injected onto asemi-preparative Nucleosil 7μ C8 10×250 mm column (Macherey Nagel),which is eluted with a mixture consisting of 55% 100 mM phosphatebuffer, pH 2.9, and 45% acetonitrile. The fractions containing the newpristinamycin are combined and extracted with one volume ofdichloromethane. The organic phase is washed with water, dried oversodium sulphate and then evaporated. 9 mg of4ζ-methoxycarbonyl-de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.70 (dd, J=16and 6 Hz, 1H, 5 β₂), 0.93 (t, J=7.5 Hz, 3H: CH₃ 2 γ), 1.08 (mt, 1H: 3β₂), from 1.30 to 1.40 (mt, 1H: 3 γ₂), 1.33 (d, J=7.5 Hz, 3H: CH₃ 1 γ)from 1.55 to 1.85 (mt, 3H: 3 γ₁ and CH₂ 2 β), 2.02 (mt, 1H, 3 β₁), 2.13(mt, 1H, 5 δ₂), 2.40 (broad d, J=16.5 Hz, 1H: 5 δ₁), 2.48 (d, J=16 Hz,1H, 5 β₁), 2.89 (dt, J=14.5 and 4.5 Hz, 1H: 5 ε₂), 3.10 (dd, J=13.5 and6 Hz, 1H: 4 β₂), 3.24 (s, 3H: NCH₃ 4), 3.38 and 3.61 (2 mts, 1H each:CH₂ 3 δ), 3.47 (t, J=13.5 Hz, 1H: 4 β₁), 3.96 (s, 3H: COOCH₃), 4.55 (t,J=7.5 Hz, 1H, 3 α), 4.78 (broad dd, J=14.5 and 8 Hz, 1H: 5 ε₁), 4.86(mt, 1H: 2α), 4.89 (broad d, J=10 Hz, 1H: 1α), 5.33 (broad d, J=6 Hz,1H: 5 α), 5.42 (dd, J=13.5 and 6 Hz, 1H: 4 α), 5.92 (d, (J=9.5 Hz) andmt, 1H each: 6 α and 1β respectively), 6.52 (d, J=10 Hz, 1H: NH 2), from7.15 to 7.35 (mt, 5H: aromatic H 6), 7.28 (d, J=8 Hz, 2H: 4δ), 7.43 (dd,J=9 and 1.5 Hz, 1H: 1′H₄), 7.47 (dd, J=9 and 5 Hz, 1H: 1′H₅), 7.66 (d,J=5 and 1.5 Hz, 1H: 1′H₆), 7.98 (d, J=8 Hz, 2H: 4ε), 8.38 (d, J=10 Hz,1H: NH 1), 8.76 (d, J=9.5 Hz, 1H: NH 6), 11.70 (s, 1H: OH).

EXAMPLE 9 Preparation of 4ζ-chloro-de(4ζ-dimethylamino)pristinamycinI_(A)

Strain SP92::pVRC508 is cultured in production medium using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 10 g/lsolution of (R,S)-4-chlorophenylalanine in 0.1 N sodium hydroxidesolution being added at 16 h. At the end of 40 h of culture, the 1.8liters of must recovered from the 60 Erlenmeyer flasks are extractedwith 2 volumes of a mixture consisting of 66% 100 mM phosphate buffer,pH 2.9, and 34% acetonitrile, and then centrifuged. The supernatant isextracted with 2 times 0.5 volumes of dichloromethane. Thechloromethylene phases are washed with water and then combined, driedover sodium sulphate and evaporated. The dry extract is taken up in 20ml of dichloromethane and injected onto a silica (30 g) column which ismounted in dichloromethane and eluted successively with plateaus of from0 to 10% methanol in dichloromethane. The fractions containing the newderivative of pristinamycin I_(A) are combined and evaporated. The dryresidue is taken up in 3 ml of a mixture consisting of 60% water and 40%acetonitrile and injected onto a semi-preparative Nucleosil 7μ C8 10×250mm column (Macherey Nagel), which is eluted with a mixture consisting of60% 100 mM phosphate buffer, pH 2.9, and 40% acetonitrile. The fractionscontaining the new pristinamycin are combined and extracted with onevolume of dichloromethane. The organic phase is washed with water, driedover sodium sulphate and then evaporated. 1 mg of4ζ-chloro-de(4ζ-dimethylamino)pristinamycin I_(A) is obtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.93 (t, J=7.5Hz, 3H: CH₃ 2 γ), 0.95 (dd, J=16 and 5 Hz, 1H, 5 β₂), 1.09 (mt, 1H: 3β₂), from 1.20 to 1.40 (mt, 1H: 3 γ₂), 1.35 (d, J=7.5 Hz, 3H: CH₃ 1 γ)from 1.50 to 1.85 (mt, 3H: 3 γ₁ and CH₂ 2 β), 2.02 (mt, 1H, 3 β₁), 2.17(mt, 1H, 5 δ₂), 2.43 (broad d, J=16 Hz, 1H: 5 δ₁), 2.59 (d, J=16 Hz, 1H:5 β₁), 2.90 (dt, J=13.5 and 4 Hz, 1H: 5 ε₂), 3.04 (dd, J=13 and 6 Hz,1H: 4 β₂), 3.21 (s, 3H: 4 NCH₃), 3.36 (t, J=13 Hz, 1H: 4 β₁), 3.39 and3.59 (2 mts, 1H each: CH₂ 3 δ), 4.53 (t, J=7.5 Hz, 1H, 3 α), 4.76 (broaddd, J=13.5 and 8 Hz, 1H: 5 ε₁), 4.86 (mt, 1H: 2α), 4.87 (broad d, J=10Hz, 1H: 1α), 5.38 (mt, 2H: 5 α and 4 α), 5.93 (mt, 2H: 6 α and 1β), 6.52(d, J=10 Hz, 1H: NH 2), 7.12 (d, J=8 Hz, 2H: 4δ) from 7.15 to 7.35 (mt,7H: aromatic H 6 and 4ε), 7.38 (dd, J=9 and 4.5 Hz, 1H:1′H₅), 7.43(broad d, J=9 Hz, 1H: 1′H₄), 7.68 (dd, J=4.5 and 1 Hz, 1H: 1′H₆), 8.36(d, J=10 Hz, 1H: NH 1), 8.75 (d, J=9 Hz, 1H: NH 6), 11.65 (s, 1H:OH).

EXAMPLE 10 Preparation of 4ζ-bromo-de(4ζ-dimethylamino)pristinamycinI_(A) and of 4ζ-bromo-de(4ζ-dimethylamino)pristinamycin I_(H)

Strain SP92::pVRC508 is cultured in production medium using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 10 g/lsolution of (R,S)-4-bromophenylalanine in 0.1 N sodium hydroxidesolution being added at 16 h. At the end of 40 h of culture, the 1.8liters of must recovered from the 60 Erlenmeyer flasks are extractedwith 2 volumes of a mixture consisting of 66% 100 mM phosphate buffer,pH 2.9, and 34% acetonitrile, and then centrifuged. The supernatant isextracted with 2 times 0.5 volumes of dichloromethane. Thechloromethylene phases are washed with water and then combined, driedover sodium sulphate and evaporated. The dry extract is taken up in 20ml of dichloromethane and injected onto a silica (30 g) column which ismounted in dichloromethane and is eluted successively with plateaus offrom 0 to 10% methanol in dichloromethane. The fractions containing thenew derivative of pristinamycin I_(A) are combined and evaporated. Thedry residue is taken up in 6 ml of a mixture consisting of 60% water and40% acetonitrile and injected in two batches onto a semi-preparativeNucleosil 7μ C8 10×250 mm column (Macherey Nagel), which is eluted witha mixture consisting of 60% 100 mM phosphate buffer, pH 2.9, and 40%acetonitrile. The fractions containing the new pristinamycin arecombined and extracted with one volume of dichloromethane. The organicphase is washed with water, dried over sodium sulphate and thenevaporated. 6 mg of 4ζ-bromo-de(4ζ-dimethylamino)pristinamycin I_(A) areobtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.93 (J=7.5 Hz,3H: CH₃ 2 γ), 0.95 (dd, J=16 and 5 Hz, 1H, 5 β₂), 1.10 (mt, 1H: 3 β₂),1.35 (d, J=7.5 Hz, 3H: CH₃ 1 γ), 1.36 (mt, 1H: 3 γ₂), from 1.50 to 1.85(mt, 3H, 3 γ₁ and CH₂ 2 β), 2.02 (mt, 1H, 3 β₁), 2.18 (mt, 1H: 5 δ₂),2.43 (broad d, J=16 Hz, 1H: 5 δ₁), 2.59 (d, J=16 Hz, 1H: 5 β₁), 2.90(dt, J=13 and 4 Hz, 1H: 5 ε₂), 3.02 (dd, J=13 and 5.5 Hz, 1H: 4 β₂),3.21 (s, 3H: 4 NCH₃), 3.33 (dd, J=13-11 Hz, 1H: 4 β₁), 3.39 and 3.59 (2mts, 1H each: CH₂ 3 δ), 4.53 (t, J=7.5 Hz, 1H, 3 α), 4.76 (broad dd,J=13 and 7 Hz, 1H: 5 ε₁), 4.86 (mt, 1H, 2α), 4.89 (d broad, J=10 Hz, 1H:1α), 5.37 (broad d, J=5 Hz, 1H: 5 α), (dd, J=11 and 5.5 Hz, 1H: 4 α),5.92 (mt, 2H: 6 α and 1β), 6.56 (d, J=9.5 Hz, 1H: NH 2), 7.08 (d, J=8Hz, 2H: 4δ), from 7.15 to 7.35 (mt, 5H: aromatic H 6), 7.40 (mt, 4H:1′H₄-1′H₅ and 4ε), 7.70 (broad d, J=5 Hz, 1H: 1′H₆), 8.40 (d, J=10 Hz,1H: NH 1), 8.77 (d, J=9 Hz, 1H: NH 6), 11.68 (s, 1H: OH).

Using the fractions derived from the silica column described above whichcontain the new derivative of pristinamycin I_(H), 3 mg of4ζ-bromo-de(4ζ-dimethylamino)pristinamycin I_(H) (mass spectrometry:M+H⁺=874) are isolated by carrying out semi-preparative columnchromatography as described above.

EXAMPLE 11 Preparation of 4ζ-iodo-de(4ζ-dimethylamino)pristinamycinI_(A) and of 4ζ-iodo-de(4ζ-dimethylamino)pristinamycin I_(H)

Strain SP92::pVRC508 is cultured in production medium using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 10 g/lsolution of (RS)-4-iodophenylalanine in sodium hydroxide solution beingadded at 16 h. At the end of 40 h of culture, the 1.8 liters of mustrecovered from the 60 Erlenmeyer flasks are extracted with 2 volumes ofa mixture consisting of 66% 100 nM phosphate buffer, pH 2.9, and 34%acetonitrile, and then centrifuged. The supernatant is extracted with 2times 0.5 volumes of dichloromethane. The chloromethylene phases arewashed with water and then combined, dried on sodium sulphate andevaporated. The dry extract is taken up in 20 ml of dichloromethane andinjected onto a silica (30 g) column which is mounted in dichloromethaneand eluted successively with plateaus of from 0 to 10% methanol indichloromethane. The fractions containing the new derivative ofpristinamycin I_(A) are combined and evaporated. The dry residue istaken up in 6 ml of a mixture consisting of 60% water and 40%acetonitrile and injected in two batches onto a semi-preparativeNucleosil 7μ C8 10×250 mm column (Macherey Nagel), which is eluted witha mixture consisting of 60% 100 nM phosphate buffer, pH 2.9, and 40%acetonitrile. The fractions containing the new pristinamycin arecombined and extracted with one volume of dichloromethane. The organicphase is washed with water, dried over sodium sulphate and thenevaporated. 12 mg of 4ζ-iodo-de(4ζ-dimethylamino)pristinamycin I_(A) areobtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.93 (J=7.5 Hz,3H: CH₃ 2 γ), 0.95 (dd, J=16 and 5.5 Hz, 1H: 5 β₂), 1.10 (mt, 1H: 3 β₂),1.35 (d, J=7.5 Hz, 3H: CH₃ 1 γ), 1.38 (mt, 1H: 3 γ₂), from 1.55 to 1.85(mt, 3H, 3 γ₁ and CH₂ 2 β), 2.02 (mt, 1H, 3 β₁), 2.17 (mt, 1H: 5 δ₂),2.43 (broad d, J=16.5 Hz, 1H: 5 δ₁), 2.60 (d, J=16 Hz, 1H: 5 β₁), 2.89(dt, J=14 and 4.5 Hz, 1H: 5 ε₂), 3.02 (dd, J=13 and 5.5 Hz, 1H: 4 β₂),3.21 (s, 3H: NCH₃ 4), 3.31 (dd, J=13 and 11 Hz, 1H: 4 β₁), 3.39 and 3.59(2 mts, 1H each: CH₂ 3 δ), 4.53 (t, J=7.5 Hz, 1H, 3 α), 4.75 (broad dd,J=14 and 8 Hz, 1H: 5 ε₁), 4.83 (mt, 1H: 2α), 4.88 (broad d, J=10 Hz, 1H:1α), 5.37 (broad d, J=5.5 Hz, 1H: 5 α), 5.39 (dd, J=11 and 5.5 Hz, 1H: 4α), 5.92 (mt, 2H: 6 α and 1β), 6.54 (d, J=9.5 Hz, 1H: NH 2), 6.94 (d,J=7.5 Hz, 2H: 4δ), from 7.15 to 7.50 (mt, 5H: aromatic H 6), 7.36 (dd,J=9 and 4 Hz, 1H: 1′H₅), 7.43 (broad d, J=9 Hz, 1H: 1′H₄), 7.62 (d,J=7.5 Hz, 2H: 4ε), 7.68 (d, J=4 Hz, 1H: 1′H₆), 8.38 (d, J=10 Hz, 1H: NH1), 8.76 (d, J=9 Hz, 1H: NH 6), 11.60 (s, 1H: OH).

Using the fractions derived from the silica column described above whichcontain the new derivative of pristinamycin I_(H), 6 mg of4ζ-iodo-de(4ζ-dimethylamino)pristinamycin I_(H) (mass spectrometry:M+H⁺=922) are isolated by carrying out semi-preparative columnchromatography as described above.

EXAMPLE 12 Preparation of4ζ-trifluoromethyl-de(4ζ-dimethylamino)pristinamycin I_(A) and of4ζ-trifluoromethyl-de(4ζ-dimethylamino)pristinamycin I_(H)

Strain SP92::pVRC508 is cultured in production medium using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 5 g/lsolution of (S)-4-trifluoromethylphenylalanine in 0.1 N sodium hydroxidesolution being added at 16 h. At the end of 40 h of culture, the 1.8liters of must recovered from the 60 Erlenmeyer flasks are extractedwith 2 volumes of a mixture consisting of 66% 100 mM phosphate buffer,pH 2.9, and 34% acetonitrile, and then centrifuged. The supernatant isextracted with 2 times 0.5 volumes of dichloromethane. Thechloromethylene phases are washed with water and then combined, dried onsodium sulphate and evaporated. The dry extract is taken up in 20 ml ofdichloromethane and injected onto a silica (30 g) column which ismounted in dichloromethane and eluted successively with plateaus of from0 to 10% methanol in dichloromethane. The fractions containing the newderivative of pristinamycin I_(A) are combined and evaporated. The dryresidue is taken up in 3 ml of a mixture consisting of 60% water and 40%acetonitrile and injected onto a semi-preparative Nucleosil 7μ C8 10×250mm column (Macherey Nagel), which is eluted with a mixture consisting of55% 100 nM phosphate buffer, pH 2.9, and 45% acetonitrile. The fractionscontaining the new pristinamycin are combined and extracted with onevolume of dichloromethane. The organic phase is washed with water, driedover sodium sulphate and then evaporated. 5 mg of4ζ-trifluoromethyl-de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.86 (dd, J=16and 5.5 Hz, 1H, 5 β₂), 0.91 (t, J=7.5 Hz, 3H: CH₃ 2γ), 1.13 (mt, 1H: 3β₂), 1.31 (d, J=7.5 Hz, 3H: CH₃ 1 γ), 1.42 (mt, 1H: 3 γ₂), from 1.55 to1.80 (mt, 3H: 3 γ₁ and CH₂ 2 β), 2.02 (mt, 1H, 3 β₁), 2.15 (mt, 1H, 5δ₂), 2.40 (broad d, J=16.5 Hz, 1H: 5 δ₁), 2.55 (d, J=16 Hz, 1H: 5 β₁),2.88 (dt, J=14 and 4 Hz, 1H: 5 ε₂), 3.18 (s, 3H: NCH₃ 4), 3.20 and 3.31(2 dd, respectively J=13 and 6 Hz and J=13 and 10 Hz, 1H each: 4 β₂ and4 β₁), 3.42 and 3.60 (2 mts, 1H each: CH₂ 3 δ), 4.50 (t, J=7.5 Hz, 1H, 3α), 4.73 (broad dd, J=14 and 7.5 Hz, 1H: 5 ε₁), 4.83 (mt, 1H: 2α), 4.91(broad d, J=10 Hz, 1H: 1α), 5.40 (broad d, J=5.5 Hz, 1H: 5 α), 5.55 (dd,J=10 and 6 Hz, 1H: 4 α), 5.87 (d, J=9.5 Hz, 1H: 6 α), 5.90 (broad q,J=7.5 Hz, 1H: 1β), 6.68 (d, J=9.5 Hz, 1H: NH 2), from 7.15 to 7.40 (mt,9H: 4δ-aromatic H 6-1′H₅ and 1′H₄), 7.52 (d, J=8 Hz, 2H: 4ε), 7.68 (d,J=4 and 1.5 Hz, 1H: 1′H₆), 8.43 (d, J=10 Hz, 1H: NH 1), 8.76 (d, J=9.5Hz, 1H: NH 6), 11.70 (s, 1H: OH).

Using the fractions derived from the silica column described above whichcontain the new derivative of pristinamycin I_(H), 4 mg ofζ-trifluoromethyl-de(4ζ-dimethylamino)pristinamycin I_(H) (massspectrometry: M+H⁺=864) are isolated by carrying out semi-preparativecolumn chromatography as described above.

EXAMPLE 13 Preparation of4ζ-tert-butyl-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 5 g/lsolution of (R,S)-4-tert-butylphenylalanine, synthesized as in Example35-1, in 0.1 N sodium hydroxide solution being added at 16 h. At the endof 40 h of culture, the 1.8 liters of must recovered from the 60Erlenmeyers are extracted with 2 volumes of a mixture consisting of 66%100 mM phosphate buffer, pH 2.9, and 34% acetonitrile, and thencentrifuged. The supernatant is extracted with 2 times 0.5 volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried on sodium sulphate and evaporated. The dry extractis taken up in 20 ml of dichloromethane and injected onto a silica (30g) column which is mounted in dichloromethane and eluted successivelywith plateaus of from 0 to 10% methanol in dichloromethane. Thefractions containing the new derivative of pristinamycin I_(A) arecombined and evaporated. The dry residue is taken up in 7 ml of amixture consisting of 60% water and 40% acetonitrile and injected in 2batches onto a semi-preparative Nucleosil 7μ C8 10×250 nm column(Macherey Nagel), which is eluted with a mixture consisting of 55% 100mM phosphate buffer, pH 2.9, and 45% acetonitrile. The fractionscontaining the new pristinamycin are combined and extracted with onevolume of dichloromethane. The organic phase is washed with water, driedover sodium sulphate and then evaporated. 30 mg of4ζ-tert-butyl-de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS, ref. TMS): 0.21(dd, J=16 and 5.5 Hz, 1H, 5 β₂), 0.91 (t, J=7.5 Hz, 3H: CH₃ 2 γ), 1.17(mt, 1H: 3 β₂), from 1.20 to 1.40 (mt, 1H: 3 γ₂), 1.33 (S, 9H: CH₃ oftert-butyl), 1.35 (d, J=7.5 Hz, 3H: CH₃ 1 γ), from 1.50 to 1.85 (mt, 3H:3 γ₁ and CH₂ 2 β), 2.04 (mt, 1H, 3 β₁), 2.13 (mt, 1H, 5 δ₂), 2.30 (mt,2H: 5 δ₁ and 5 β₁), 2.80 (dt, J=13 and 4 Hz, 1H: 5 ε₂), 3.00 (dd, J=12and 4 Hz, 1H: 4 β₂), 3.29 (s, 3H: NCH₃4), 3.31 and 3.59 (2 mts, 1H each:CH₂ 3 δ), 3.40 ft, J=12 Hz, 1H: 4 β₁), 4.57 (t, J=7.5 Hz, 1H, 3 α), 4.74(broad dd, J=13 and 7 Hz, 1H: 5 ε₁), 4.85 (mt, 1H: 2α), 4.90 (broad d,J=10 Hz, 1H: 1α), 5.21 (broad d, J=5.5 Hz, 1H: 5 α), 5.25 (dd, J=12 and4 Hz, 1H: 4 α), 5.87(d, J=9 Hz, 1H: 6 α), 5.92 (broad q, J=7.5 Hz, 1H: 1[lacuna] 1H: 1′H₆), 8.45 (d, J=10 Hz, 1H: NH 1), 8.74 (d, J=9 Hz, 1H: NH6), 11.65 (s, 1H:OH).

EXAMPLE 14 Preparation of 4ζ-isopropyl-de(4ζ-dimethylamino)pristinamycinI_(A) and of 4ζ-isopropyl-de(4ζ-dimethylamino)pristinamycin I_(E)

Strain SP92::pVRC508 is cultured in production medium using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 10 g/lsolution of (R,S)-4-isopropylphenylalanine, synthesized as in Example36-1, in 0.1 N sodium hydroxide solution being added at 16 h. At the endof 40 h of culture, the 1.8 liters of must recovered from the 60Erlenmeyer flasks are extracted with 2 volumes of a mixture consistingof 66% 100 mM phosphate buffer, pH 2.9, and 34% acetonitrile, and thencentrifuged. The supernatant is extracted with 2 times 0.5 volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing the new derivative of pristinamycin I_(A) arecombined and evaporated. 61 mg of the dry residue are obtained. Thisresidue is taken up in 9 ml of a mixture consisting of 60% water and 40%acetonitrile and injected in 3 batches onto a semi-preparative Nucleosil7μ C8 10×250 mm column (Macherey Nagel), which is eluted with a mixtureconsisting of 55% 100 mM phosphate buffer, pH 2.9, and 45% acetonitrile.The fractions containing the new pristinamycin are combined andextracted with one volume of dichloromethane. The organic phase iswashed with water, dried over sodium sulphate and then evaporated. 51 mgof 4ζ-isopropyl-de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum: ¹H (250 MHz, CDCl₃, δ in ppm, ref. TMS, ref. TMS): 0.31(dd, J=16 and 5.5 Hz, 1H, 5 β₂), 0.91 (t, J=7.5 Hz, 3H: CH₃ 2 γ), from1.00 to 1.45 (mt, 2H: 3 β₂ and 3 γ₂), 1.25 (d, J=7.5 Hz, 6H: CH₃ ofisopropyl), 1.35 (d, J=7.5 Hz, 3H: CH₃ 1 γ), from 1.50 to 1.85 (mt, 3H:3 γ₁ and CH₂ 2 β), from 1.95 to 2.20 (mt, 2H, 3 β₁ and 5 δ₂), 2.30 (mt,2H: 5 δ₁ and 5 β₁), 2.80 (dt, J=13 and 4 Hz, 1H: 5 ε₂), 2.88 (mt, 1H: CHof isopropyl), 2.98 (dd, J=12 and 4 Hz, 1H: 4 β₂), 3.30 (s, 3H: NCH₃ 4),3.32 and 3.55 (2 mts, 1H each: CH₂ 3 δ), 3.38 (t, J=12 Hz, 1H: 4 β₁),4.55 (t, J=7.5 Hz, 1H, 3 α), 4.72 (broad dd, J=13 and 7 Hz, 1H: 5 ε₁),4.85 (mt, 1H: 2α), 4.88 (broad d, J=10 Hz, 1H: 1α), 5.21 (broad d, J=5.5Hz, 1H: 5α), 5.25 (dd, J=12 and 4 Hz, 1H: 4 α), 5.87 (d, J=9 Hz, 1H: 6α), 5.90 (broad q, J=7.5 Hz, 1H: 1β), 6.50 (d, J=9.5 Hz, 1H: NH 2), from7.05 to 7.35 (mt, 9H: aromatic H 6-4ε and 4δ), 7.50 (mt, 2H: 1′H₅ and1′H₄), 7.86 (dd, J=4 and 1.5 Hz, 1H: 1′H₆), 8.40 (d, J=10 Hz, 1H: NH 1),8.72 (d, J=9 Hz, 1H: NH 6), 11.60 (s, 1H: OH).

Using the same fractions derived from the silica column described above,which fractions also contain the new derivative of pristinamycin I_(E),5 mg of ζ-isopropyl-de(4ζ-dimethylamino)pristinamycin I_(E) are isolatedby carrying out semi-preparative column chromatography as describedabove.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.20 (mt, 1H, 5β₂), 0.92 (t, J=7.5 Hz, 3H: CH₃ 2 γ), from 1.15 to 1.40 (mt, 2H: 3 β₂and 3 γ₂), 1.24 (d, J=7.5 Hz, 6H: CH₃ of isopropyl), 1.34 (d, J=7.5 Hz,3H: CH₃ 1 γ), from 1.35 to 2.05 (mt, 9H: 3 γ₁-3 β₁-CH₂ 2 β-CH₂ 5 δ-CH₂ 5γ and 5 β₁), 2.45 (dt, J=13 and 1.5 Hz, 1H: 5ε₂), 2.89 (mt, 1H: ArCH),3.09 (dd, J=14 and 7 Hz, 1H: 4 β₂), 3.17 (s, 3H: NCH₃ 4), 3.25 (dd, J=14and 9 Hz, 1H: 4 β₁), 3.32 and 3.52 (2 mts, 1H each: CH₂ 3 δ), 4.55 (mt,2H: 3 α and 5 ε₁), 4.80 (mt, 1H: 2α), 4.89 (dd, J=10 and 1.5 Hz, 1H:1α), 4.90 (mt, 1H: 5 α), 5.35 (dd, J=9 and 7 Hz, 1H: 4 α), 5.60 (d, J=8Hz, 1H: 6 α), 5.89 (dq, J=7.5 and 1.5 Hz, 1H: 1β), 6.65 (d, J=9.5 Hz,1H: NH 2), 7.08 (d, J=8 Hz, 2H: 4δ), 7.14 (d, J=8 Hz, 2H: 4ε), from 7.20to 7.40 (mt, 7H: aromatic H 6-1′H4 and 1′H₅), 7.77 (broad d, J=4 Hz, 1H:1′H₆), 8.46 (d, J=10 Hz, 1H: NH 1), 8.48 (d, J=8 Hz, 1H: NH 6), 11.70(s, 1H: OH).

EXAMPLE 15 Preparation of4ε-methylamino-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 10 g/lsolution of (R,S)-3-methylaminophenylalanine, synthesized as in Example35-3, in water being added at 16 h. At the end of 40 h of culture, the1.8 liters of must recovered from the 60 Erlenmeyer flasks are extractedwith 2 volumes of a mixture consisting of 66% of 100 nM phosphatebuffer, pH 2.9, and 34% acetonitrile, and then centrifuged. Thesupernatant is extracted with 2 times 0.5 volumes of dichloromethane.The chloromethylene phases are washed with water and then combined,dried over sodium sulphate and evaporated. The dry extract is taken upin 20 ml of dichloromethane and injected onto a silica (30 g) columnwhich is mounted in dichloromethane and is eluted successively withplateaus of from 0 to 10% methanol in dichloromethane. The fractionscontaining the new derivative of pristinamycin I_(A) are combined andevaporated. 19 mg of dry residue are obtained. This residue is taken upin 3 ml of a mixture consisting of 60% water and 40% acetonitrile andinjected onto a semi-preparative Nucleosil 7μ C8 10×250 mm column(Macherey Nagel), which is eluted with a mixture consisting of 55% 100mM phosphate buffer, pH 2.9, and 45% acetonitrile. The fractionscontaining the new pristinamycin are combined and extracted with onevolume of dichloromethane. The organic phase is washed with water, driedover sodium sulphate and then evaporated. 8 mg of4ε-methylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.93 (t, J=7.5Hz, 3H: CH₃ 2 γ), 1.00 (dd, J=16 and 6 Hz, 1H, 5 β₂), 1.17 (mt, 1H: 3β₂), from 1.25 to 1.40 (mt, 2H: 3 γ₂), 1.35 (d, J=7.5 Hz, 3H: CH₃ 1 γ),from 1.55 to 1.80 (mt, 3H: 3 γ₁ and CH₂ 2 β), 2.03 (mt, 1H, 3 β₁), 2.23(Mt, 1H, 5 δ₂), 2.39 (broad d, J=16 Hz, 1H: 5 δ₁), 2.52 (d, J=16 Hz, 1H:5 β₁), 2.78 (s, 3H: ArNCH₃ 4), 2.85 (dt, J=13 and 4 Hz, 1H: 5 ε₂), 2.99(dd, J=13 and 4.5 Hz, 1H: 4 β₂), 3.23 (s, 3H: NCH₃ 4), 3.25 (t, J=13 Hz,1H: 4β₁), 3.38 and 3.58 (2 mts, 1H each: CH₂ 3 δ), 4.05 (unres. comp.,1H: ArNH), 4.58 (dd, J=6.5 and 7.5 Hz, 1H, 3 α), 4.76 (broad dd, J=13and 8 Hz, 1H: 5 ε₁), 4.85 (mt, 1H: 2α), 4.87 (broad d, J=10 Hz, 1H: 1α),5.35 (dd, J=13 and 4.5 Hz, 1H: 4 α), 5.38 (broad d, J=6 Hz, 1H: 5 α),5.90 (d, J=9.5 Hz, 1H: 6 α), 5.91 (mt, 1H: 1β), 6.36 (broad s, 1H: H 2of the aromatic moiety at position 4), from 6.45 to 6.55 (mt, 2H: H4 andH6 of the aromatic moiety in position 4), 6.53 (d, J=10 Hz, 1H: NH 2),7.12 (t, J=8 Hz, 1H: H 5 of the aromatic moiety in position 4), from7.15 to 7.45 (mt, 5H: aromatic H 6), 7.35 (mt, 2H: 1′H₄ and 1′H₅), 7.75(t, J=3 Hz, 1H: 1′ H₆), 8.40 (d, J=10 Hz, 1H: NH 1), 8.78 (d, J=9.5 Hz,1H: NH 6), 11.60 (s, 1H: OH).

EXAMPLE 16 Preparation of 4ε-methoxy-de(4ζ-dimethylamino)pristinamycinI_(A) and of 4ε-methoxy-de(4ζ-dimethylamino)pristinamycin I_(H)

Strain SP92::pVRC508 is cultured in production medium using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 5 g/lsolution of (S)-3-methoxyphenylalanine in 0.1N sodium hydroxide solutionbeing added at 16 h. At the end of 40 h of culture, the 1.8 liters ofmust recovered from the 60 Erlenmeyer flasks are extracted with 2volumes of a mixture consisting of 66% 100 mM phosphate buffer, pH 2.9,and 34% acetonitrile, and then centrifuged. The supernatant is extractedwith 2 times 0.5 volumes of dichloromethane. The chloromethylene phasesare washed with water and then combined, dried over sodium sulphate andevaporated. The dry extract is taken up in 20 ml of dichloromethane andinjected onto a silica (30 g) column which is mounted in dichloromethaneand eluted successively with plateaus of from 0 to 10% methanol indichloromethane. The fractions containing the new derivative ofpristinamycin I_(A) are combined and evaporated. 41 mg of dry residueare obtained. This residue is taken up in 6 ml of a mixture consistingof 60% water and 40% acetonitrile and injected in 2 batches onto asemi-preparative Nucleosil 7μ C8 10×250 mm column (Macherey Nagel),which is eluted with a mixture consisting of 55% 100 mM phosphatebuffer, pH 2.9, and 45% acetonitrile. The fractions containing the newpristinamycin are combined and extracted with one volume ofdichloromethane. The organic phase is washed with water, dried oversodium sulphate and then evaporated. 28 mg of4ε-methoxy-de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.52 (dd, J=16and 5.5 Hz, 1H, 5 β₂), 0.90 (t, J=7.5 Hz, 3H: CH₃ 2 γ), from 1.10 to1.34 (mt, 2H: 3 β₂ and 3 γ₂), 1.34 (d, J=7.5 Hz, 3H: CH₃ 1γ), from 1.50to 1.80 (mt, 3H: 3 γ₁ and CH₂ 2 β), 2.40 (mt, 1H, 3 β₁), 2.20 (mt, 1H, 5δ₂), 2.35 (broad d, J=16 Hz, 1H: 5 δ₁), 2.38 (d, J=16 Hz, 1H: 5 β₁),2.83 (dt, J=13 and 4 Hz, 1H: 5 ε₂), 2.97 (dd, J=12 and 4 Hz, 1H: 4 β₂),3.28 (s, 3H: NCH₃ 4), 3.28 and 3.56 (2 mts, 1H each: CH₂ 3 δ), 3.40 (t,J=12 Hz, 1H: 4 β₁), 3.80 (s, 3H: OCH₃), 4.58 (t, J=7.5 Hz, 1H, 3 α),4.76 (broad dd, J=13 and 8 Hz, 1H: 5 ε₁), 4.85 (mt, 1H: 2α), 4.90 (broadd, J=10 Hz, 1H: 1α): 5.27 (dd, J=12 and 4 Hz, 1H: 4 α), 5.30 (broad d,J=5.5 Hz, 1H: 5 α), 5.89 (d, J=9.5 Hz, 1H: 6 α), 5.91 (broad q, J=7.5Hz, 1H: 1β), 6.51 (d, J=10 Hz, 1H: NH 2), from 6.80 to 6.90 (mt, 3H: H2-H 4 and H 6 of the aromatic moiety in position 4), from 7.15 to 7.40(mt, 6H: H 5 of the aromatic moiety in position 4 and aromatic H 6),7.45 (broad d, J=9 Hz, 1H: 1′H₄), 7.50 (dd, J=9 and 4 Hz, 1H:1′H₅), 7.80(broad d, J=4 Hz, 1H: 1′H₆), 8.40 (d, J=10 Hz, 1H: NH 1), 8.73 (d, J=9.5Hz, 1H: NH 6), 11.62 (s, 1H: OH).

Using the fractions derived from the silica column described above whichcontain the new derivative of pristinamycin I_(H), 7 mg of4ε-methoxy-de(4ζ-dimethylamino)pristinamycin I_(H) (mass spectrometry:M+H⁺=826) are isolated by carrying out semi-preparative columnchromatography as described above.

EXAMPLE 17 Preparation of4ε-fluoro-4ζ-methyl-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 60Erlenmeyer flasks, as described in Example 3, with 1 ml of a 10 g/lsolution of (R,S)-3-fluoro-4-methylphenylalanine, synthesized as inExample 34-5, in 0.1N sodium hydroxide solution being added at 16 h. Atthe end of 40 h of culture, the 1.8 liters of must recovered from the 60Erlenmeyer flasks are extracted with 2 volumes of a mixture consistingof 66% 100 nM phosphate buffer, pH 2.9, and if 34% acetonitrile, andthen centrifuged. The supernatant is extracted with 2 times 0.5 volumesof dichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing the new derivative of pristinamycin I_(A) arecombined and evaporated. 15 mg of dry residue are obtained. This residueis taken up in 3 ml of a mixture consisting of 60% water and 40%acetonitrile and injected onto a semi-preparative Nucleosil 7μ C8 10×250mm (Macherey Nagel) column, which is eluted with a mixture consisting of55% 100 mM phosphate buffer, pH 2.9, and 45% acetonitrile. The fractionscontaining the new pristinamycin are combined and extracted with onevolume of dichloromethane. The organic phase is washed with water, driedover sodium sulphate and then evaporated. 9 mg of4ε-fluoro-4ζ-methyl-de(4ζ-dimethylamino)pristinamycin I_(A) areobtained.

NMR spectrum: ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.60 (dd, J=16and 5.5 Hz, 1H, 5 β₂), 0.91 (t, J=7.5 Hz, 3H: CH₃ 2 γ), 1.12 (mt, 1H: 3β₂), from 1.25 to 1.35 (mt, 1H: 3 γ₂), 1.33 (d, J=7.5 Hz, 3H: CH₃ 1 γ),from 1.50 to 1.85 (mt, 3H: 3 γ₁ and CH₂ 2 β), 2.02 (mt, 1H, 3 β₁), 2.13(mt, 1H, 5 δ₂), 2.27 (s, 3H: ArCH₃), 2.36 (broad d, J=16 Hz, 1H: 5 δ₁),2.45 (d, J=16 Hz, 1H: 5 β₁), 2.85 (dt, J=13 and 4.5 Hz, 1H: 5 ε₂), 2.97(dd, J=12.5 and 4.5 Hz, 1H: 4 β₂), 3.23 (s, 3H: NCH₃ 4), 3.30 and 3.56(2 mts, 1H each: CH₂ 3 δ), 3.37 (t, J=12.5 Hz, 1H: 4 β₁), 4.55 (t, J=7.5Hz, 1H, 3 α), 4.75 (broad dd, J=13 and 8 Hz, 1H: 5 ε₁), 4.83 (mt, 1H:2α), 4.89 (broad d, J=10 Hz, 1H: 1α), 5.29 (dd, J=12.5 and 4.5 Hz, 1H: 4α), 5.32 (broad d, J=5.5 Hz, 1H: 5 α), 5.89 (d J=9.5 Hz, 1H: 6 α), 5.92(mt, 1H: 1β), 6.49 (d, J=10 Hz, 1H: NH 2), 6.90 (mt, 2H: H 2 and H 6 ofthe aromatic moiety in position 4), 7.11 (t, J=8 Hz, 1H: H 5 of thearomatic moiety in position 4), from 7.10 to 7.30 (mt, 5H: aromatic H6), 7.43 (dd, J=8.5 and 1 Hz, 1H: 1′H₄), 7.49 (dd, J=8.5 and 4.5 Hz, 1H:1′H₅), 7.75 (dd, J=4.5 and 1 Hz, 1H: 1′H₆), 8.48 (d, J=10 Hz, 1H: NH 1),8.70 (d, J=9.5 Hz, 1H: NH 6), 11.60 (s, 1H: OH).

EXAMPLE 18 Preparation of 4ζ-ethylamino-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 50erlenmeyer flasks, as described in Example 31 with 1 ml of a 20 g/lsolution of (R,S) -4-ethylaminophenylalanine dihydrochloride,synthesized as in Example 33, in 0.1N sodium hydroxide solution beingadded at 16 h. At the end of 40 h of culture, the 1.5 liters of mustrecovered from the 50 erlenmeyer flasks are extracted with 2 volumes ofa mixture of 66% 100 mM phosphate buffer, pH 2.9, and 34% acetonitrile,and then centrifuged. The supernatant is extracted with 2 times 0.5volumes of dichloromethane. The chloromethylene phases are washed withwater and then combined, dried over sodium sulphate and evaporated. Thedry extract is taken up in 20 ml of dichloromethane and injected onto asilica column (30 g) which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing 4ζ-ethylamino-de(4ζ-dimethylamino)pristinamycinI_(A) are combined and evaporated. The dry residue is taken up in 7 mlof a mixture consisting of 65% water and 35% acetonitrile and injectedonto a semi-preparative Nucleosil 7μ C8 10×250 mm (Macherey Nagel)column, which is eluted with a mixture consisting of 60% 100 mMphosphate buffer, pH 2.9, and 40% acetonitrile. The fractions containing4ζ-ethylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are combined andextracted with one volume of dichloromethane. The organic phase iswashed with water, dried over sodium sulphate and then evaporated. 10 mgof 4ζ-ethylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.72 (dd, J=16and 6 Hz, 1H: 1H of the CH₂ in 5 β); 0.90 (t, J=7.5 Hz, 3H: CH₃ in 2 γ);1.15 (mt, 1H: 1H of the CH₂ in 3 β); from 1.20 to 1.40 (mt, 1H: 1H ofthe CH₂ in 3 γ); 1.27 (t, J=7.5 Hz, 3H: CH₃ of the ethyl); 1.33 (d, J=7Hz, 3H: CH₃ in 1 γ); from 1.50 to 1.65 (mt, 1H: the other H of the CH₂in 3 γ); 1.60 and 1.74 (2 mts, 1H each: CH₂ in 2 β); 2.02 (mt, 1H: theother H of CH₂ in 3 β); 2.21 and 2.33 (respectively, mt and broad d,J=16.5 Hz, 1H each: CH₂ in 5 δ); 2.40 (d, J=16 Hz, 1H: the other H ofthe CH₂ in 5 β); 2.82 (dt, J=13 and 4.5 Hz, 1H: 1H of the CH₂ in 5 ε);2.89 (dd, J=12 and 4 Hz, 1H: 1H of the CH₂ in 4 β); 3.10 (mt, 2H: NCH₂of the ethyl); from 3.20 to 3.35 (mt, 1H: 1H of the CH₂ in 3 δ); 3.26(s, 3H: NCH₃); 3.31 (t, J=12 Hz, 1H: the other H of the CH₂ in 4 β);3.54 (mt, 1H: the other H of the CH₂ in 3 δ); 3.67 (unres. comp., 1H:NH); 4.56 (dd, J=6.5 and 7 Hz, 1H: 3 α); 4.75 (broad dd, J=13 and 8 Hz,1H: the other H of the CH₂ in 5 ε); 4.84 (mt, 1H: 2 α); 4.90 (broad d,J=10 Hz, 1H : 1 α); 5.24 (dd, J=12 and 4 Hz, 1H: 4 α); 5.32 (broad d,J=6 Hz, 1H: 5 α); 5.88 (d, J=9.5 Hz, 1H : 6 α); 5.90 (mt, 1H : 1 β);6.52 (d, J=8 Hz, 3H:NH in 2 and aromatic H in 4 ε); 7.00 (d, J=8 Hz,2H:aromatic H in 4 δ); from 7.10 to 7.35 (mt, 5H: aromatic H in 6); 7.46(limiting AB, 2H: 1′H₄ and 1′H₅); 7.84 (dd, J=4 and 1 Hz, 1H: 1′H₆);8.45 (d, J=10 Hz, 1H: NH in 1); 8.77 (d, J=9.5 Hz, 1H: NH in 6); 11.65(s, 1H: OH).

EXAMPLE 19 Preparation of4ζ-diethylamino-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 50erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (R,S)-4-diethylaminophenylalanine dihydrochloride,synthesized as in Example 33, in 0.1N sodium hydroxide solution beingadded at 16 h. At the end of 40 h of culture, the 1.5 liters of mustrecovered from the 50 erlenmeyer flasks are extracted with 2 volumes ofa mixture of 66% 100 mM phosphate buffer, pH 2.9, and 34% acetonitrile,and then centrifuged. The supernatant is extracted with 2 times 0.5volumes of dichloromethane. The chloromethylene phases are washed withwater and then combined, dried over sodium sulphate and evaporated. Thedry extract is taken up in 20 ml of dichloromethane and injected onto asilica column (30 g) which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing4ζ-diethylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are combined andevaporated. The dry residue is taken up in 7 ml of a mixture consistingof 60% water and 40% acetonitrile and injected in two portions onto asemi-preparative Nucleosil 7μ C8 10×250 mm (Macherey Nagel) column,which is eluted with a mixture consisting of 68% 100 mM phosphatebuffer, pH 2.9, and 32% acetonitrile. The fractions containing4ζ-diethylamino -de(4ζ-dimethylamino)pristinamycin I_(A) are combinedand extracted with one volume of dichloromethane. The organic phase iswashed with water, dried over sodium sulphate and then evaporated. 50 mgof 4ζ-diethylamino -de(4ζ-dimethylamino)pristinamycin I_(A) areobtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.65 (dd, J=16and 6 Hz, 1H: 1H of the CH₂ in 5 β); 0.90 (t, J=7.5 Hz, 3H: CH₃ in 2 γ);1.14 (t, J=7 Hz, 6H: CH₃ of the ethyl); 1.15 (mt, 1H: 1H of the CH₂ in 3β); 1.26 (mt, 1H: 1H of the CH₂ in 3 γ); 1.32 (d, J=6.5 Hz, 3H: CH₃ in 1γ); 1.55 (mt, 1H: the other H of the CH₂ in 3 7 γ); 1.63 and 1.75 (2mts, 1H each: CH₂ in 2 β): 2.02 (mt, 1H: the other H of the CH₂ in 3 β);2.22 and 2.31 (respectively, mt and broad d, J=16.5 Hz, 1H each: CH₂ in5 δ); 2.37 (d, J=16 Hz, 1H: the other H of the CH₂ in 5 β); 2.80 (dt,J=13 and 4.5 Hz, 1H: 1H of the CH₂ in 5 ε); 2.89 (dd, J=12.5 and 4 Hz,1H: 1H of the CH₂ in 4 β); from 3.20 to 3.40 (mt, 6H: NCH₂ of theethyl—1H of the CH₂ in 3 δand the other H of the CH₂ in 4 β); 3.27 (s,3H: NCH₃); 3.55 (mt, 1H: the other H of the CH₂ in 3 δ); 4.58 (dd, J=8and 6 Hz, 1H: 3 α); 4.76 (broad dd, J=13 and 7.5 Hz, 1H: the other H ofthe CH₂ in 5 ε); 4.84 (mt, 1H: 2 α); 4.89 (dd, J=10 and 1 Hz, 1H: 1 α);5.21 (dd, J=12.5 and 4 Hz, 1H: 4 α); 5.28 (broad d, J=6 Hz, 1H: 5 α);5.87 (d, J=9.5 Hz, 1H: 6 α); 5.90 (mt, 1H: 1 β); 6.52 (d, J=9.5 Hz, 1H:NH in 2); 6.60 (d, J=8 Hz, 2H: aromatic H in 4 ε); 7.02 (d, J=8 Hz, 2H:aromatic H in 4 δ); from 7.10 to 7.35 (mt, 5H: aromatic H in 6); 7.46(limiting AB, 2H: 1′H₄ and 1′H₅); 7.88 (dd, J=4.5 and 2.5 Hz, 1H: 1′H₆);8.43 (d, J=10 Hz, 1H: NH in 1); 8.76 (d, J=9.5 Hz, 1H: NH in 6); 11.62(s, 1H: OH).

EXAMPLE 20 Preparation of 4ζ-diallylamino-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 94erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (R,S)-4-diallylaminophenylalanine dihydrochloride,synthesized as in Example 38-1, in water being added at 16 h. At the endof 40 h of culture, the 2.8 liters of must recovered from the 94erlenmeyer flasks are extracted with 2 volumes of a mixture consistingof 66% 100 mM phosphate buffer, pH 2.9, and 34% acetonitrile, and thencentrifuged. The supernatant is extracted with 2 times 0.5 volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing4ζ-diallylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are combined andevaporated. The dry residue is taken up in 7 ml of a mixture consistingof 60% water and 40% acetonitrile and injected onto a semi-preparativeNucleosil 7μ C8 10×250 mm (Machery Nagel) column, which is eluted with amixture consisting of 52% 100 mM phosphate buffer, pH 2.9, and 48%acetonitrile. The fractions containing4ζ-diallylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are combined andextracted with one volume of dichloromethane. The organic phase iswashed with water, dried over sodium sulphate and then evaporated. 15 mgof 4ζ-diallylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref.TMS): 0.55 (dd, J=16 and6 Hz, 1H: 1H of the CH₂ in 5 β); 0.93 (t, J=7.5 Hz, 3H: CH₃ in 2 γ);1.18 (mt, 1H: 1H of the CH₂ in 3 β); 1.25 (mt, 1H: 1H of the CH₂ in 3γ); 1.34 (d, J=6.5 Hz, 3H: CH₃ in 1 γ); 1.59 (mt, 1H: the other H of theCH₂ in 3 γ); 1.68 and 1.78 (2 mts, 1H each: CH₂ in 2 β); 2.04 (mt, 1H:the other H of CH₂ in 3 β); 2.25 and 2.34 (respectively, mt and broad d,J=16.5 Hz, 1H each: CH₂ in 5 δ); 2.40 (d, J=16 Hz, 1H: the other H ofthe CH₂ in 5 β); 2.83 (dt, J=13 and 4.5 Hz, 1H: 1H of the CH₂ in 5 ε);2.92 (dd, J=12 and 4 Hz, 1H: 1H of the CH₂ in 4 β); from 3.20 to 3.30(mt, 1H: 1H of the CH₂ in 3 δ); 3.29 (s, 3H: NCH₃); 3.33 (t, J=12 Hz,1H: the other H of the CH₂ in 4 β); 3.57 (mt, 1H: the other H of the CH₂in 3 δ); 3.93 (limiting AB, 4H: NCH₂ of the allyl); 4.60 (dd, J=8 and6.5 Hz, 1H: 3 α); 4.78 (broad dd, J=13 and 7.5 Hz, 1H: the other H ofthe CH₂ in 5 ε); 4.87 (mt, 1H: 2 α); 4.92 (dd, J=10 and 1 Hz, 1H: 1 α);from 5.10 to 5.25 (mt, 5H: 4 α and =CH₂ of the allyl); 5.28 (broad d,J=6 Hz, 1H: 5 α); 5.85 (mt, 2H: CH=of the allyl); 5.92 (d, J=9.5 Hz, 1H:6 α); 5.94 (mt, 1H: 1 β); 6.54 (d, J=10 Hz, 1H: NH in 2); 6.65 (d, J=8Hz, 2H: aromatic H in 4 ε); 7.05 (d, J=8 Hz, 2H: aromatic H in 4 δ);from 7.10 to 7.35 (mt, 5H: aromatic H in 6); 7.51 (limiting AB, 2H: 1′H₄and 1′H₅); 7.88 (dd, J=4 and 2 Hz, 1H: 1′H₆); 8.43 (d, J=10 Hz, 1H: NHin 1); 8.77 (d, J=9.5 Hz, 1H: NH in 6); 11.65 (s, 1H: OH).

EXAMPLE 21 Preparation of 4ζ-allylethyl-amino-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 26erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (R,S)-4-allylethylaminophenylalanine dihydrochloride,synthesized as in Example 39-4, in 0.1N sodium hydroxide solution beingadded at 16 h. At the end of 40 h of culture, the 0.78 liter of mustrecovered from the 26 erlenmeyer flasks is extracted with 2 volumes of amixture consisting of 66% 100 mM phosphate buffer, pH 2.9, and 34%acetonitrile, and then centrifuged. The supernatant is extracted with 2times 0.5 volumes of dichloromethane. The chloromethylene phases arewashed with water and then combined, dried over sodium sulphate andevaporated.

The dry extract is taken up in 20 ml of dichloromethane and injectedonto a silica (30 g) column which is mounted in dichloromethane andeluted successively with plateaus of from 0 to 10% methanol indichloromethane. The fractions containing4ζ-allylethylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are combinedand evaporated. The dry residue is taken up in 7 ml of a mixtureconsisting of 60% of water and 40% acetonitrile and injected onto asemi-preparative Nucleosil 7μC8 10×250 ram (Macherey Nagel) column,which is eluted with a mixture consisting of 52% 100 mM phosphatebuffer, pH 2.9, and 48% of acetonitrile. The fractions containing4ζ-allylethylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are combinedand extracted with one volume of dichloromethane. The organic phase iswashed with water, dried over sodium sulphate and then evaporated. 20 mgof 4ζ-allylethylamino-de(4ζ-dimethylamino) -pristinamycin IA areobtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.58 (dd, J=16and 6 Hz, 1H: 1H of CH₂ in 5 β); 0.91 (t, J=7.5 Hz, 3H: CH₃ in 2 γ);1.16 (t, J=7 Hz, 3H: CH₃ of the ethyl); 1.16 (at, 1H: 1H of the CH₂ in 3β); 1.25 (mt, 1H: 1H of CH₂ in 3 γ); 1.32 (d, J=6.5 Hz, 3H: CH₃ in 1 γ);1.54 (mt, 1H: the other H of the CH₂ in 3 γ); 1.63 and 1.75 (2 mts, 1Heach: CH₂ in 2 β); 2.02 (mt, 1H: the other H of the CH₂ in 3 β); 2.23and 2.31 (respectively, mt and broad d, J=16.5 Hz, 1H each: CH₂ in 5 δ);2.37 (d, J=16 Hz, 1H: the other H of the CH₂ in 5 β); 2.80 (dt, J=13 and4.5 Hz, 1H: 1H of CH₂ in 5 ε); 2.87 (dd, J=12 and 4 Hz, 1H: 1H of theCH₂ in 4 β); from 3.15 to 3.30 (mt, 1H: 1H of the CH₂ in 3 δ); 3.26 (s,3H: NCH₃); 3.30 (t, J=12 Hz, 1H: the other H of CH₂ in 4 β); 3.36 (mt,2H: NCH₂ of the ethyl); 3.54 (mt, 1H: the other H of the CH₂ in 3 δ);3.90 (limiting AB, 2H: NCH₂ of the allyl); 4.57 (dd, J=8 and 6 Hz, 1H: 3α); 4.76 (broad dd, J=13 and 7.5 Hz, 1H: the other H of the CH₂ in 5 ε);4.84 (mt, 1H: 2 α); 4.89 (dd, J=10 and 1 Hz, 1H: 1 α); from 5.05 to 5.20(mt, 3H: 4 α and =CH₂ of the allyl); 5.27 (broad d, J=6 Hz, 1H: 5 α);5.83 (mt, 1H: CH═ of the allyl); 5.88 (d, J=9.5 Hz, 1H: 6 α); 5.91 (mt,1H: 1 β); 6.50 (d, J=10 Hz, 1H: NH in 2); 6.60 (d, J=8 Hz, 2H: aromaticH in 4 ε); 7.02 (d, J=8 Hz, 2H: aromatic H in 4 δ); from 7.10 to 7.35(mt, 5H: aromatic H in 6); 7.47 (limiting AB, 2H: 1′H₄ and 1′H₅); 7.88(dd, J=4 and 2 Hz, 1H: 1′H₆); 8.41 (d, J=10 Hz, 1H: NH in 1); 8.75 (d,J=9.5 Hz, 1H: NH in 6); 11.62 (s, 1H: OH).

EXAMPLE 22 Preparation of the 4ζ-ethyl-propylamino-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 60erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (R,S)-4-ethylpropylaminophenylalanine dihydrochloride,synthesized as in Example 39-6, in 0.1N sodium hydroxide solution beingadded at 16 h. At the end of 40 h of culture, the 1.8 liter of mustrecovered from the 60 erlenmeyer flasks is extracted with 2 volumes of amixture consisting of 66% 100 mM phosphate buffer, pH 2.9, and 34%acetonitrile, and then centrifuged. The supernatant is extracted with 2times 0.5 volumes of dichloromethane. The chloromethylene phases arewashed with water and then combined, dried over sodium sulphate andevaporated. The dry extract is taken up in 20 ml of dichloromethane andinjected onto a silica (30 g) column which is mounted in dichloromethaneand eluted successively with plateaus of from 0 to 10% methanol indichloromethane. The fractions containing4ζ-ethylpropylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are combinedand evaporated. The dry residue is taken up in 7 ml of a mixtureconsisting of 60% of water and 40% acetonitrile and injected onto asemi-preparative Nucleosil 7μ C8 10×250 mm (Macherey Nagel) column,which is eluted with a mixture consisting of 63% 100 mM phosphatebuffer, pH 2.9, and 37% of acetonitrile. The fractions containing4ζ-ethylpropylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are combinedand extracted with one volume of dichloromethane. The organic phase iswashed with water, dried over sodium sulphate and then evaporated. 16 mgof 4ζ-ethylpropyl-amino-de(4ζ-dimethylamino) -pristinamycin I_(A) areobtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.67 (dd, J=16and 6 Hz, 1H: 1H of the CH₂ in 5 β); 0.91 (t, J=7.5 Hz, 3H: CH₃ in 2 γ);0.95 (t, J=7.5 Hz, 3H: CH₃ of propyl); 1.14 (t, J=7 Hz, 3H: CH₃ of theethyl); 1.15 (mt, 1H: 1H of the CH₂ in 3 ); 1.25 (mt, 1H: 1H of the CH₂in 3 γ); 1.33 (d, J=7 Hz, 3H: CH₃ in 1 γ); from 1.45 to 1.65 (mt, 3H:the other H of the CH₂ in 3 γ and CH₂ propyl); 1.63 and 1.75 (2 mts, 1Heach: CH₂ in 2 β); 2.02 (mt, 1H: the other H of the CH₂ in 3 β); 2.23and 2.33 (respectively, mt and broad d, J=16.5 Hz, 1H each: CH₂ in 5 δ);2.37 (d, J=16 Hz, 1H: the other H of the CH₂ in 5 β); 2.80 (dt, J=13 and5 Hz, 1H: 1H of the CH₂ in 5 ε); 2.89 (dd, J=12 and 4 Hz, 1H: 1H of theCH₂ in 4 β); from 3.10 to 3.25 (mt, 3H: 1H of the CH₂ in 3 δ and NCH₂ ofthe propyl); 3.26 (s, 3H: NCH₃); from 3.25 to 3.40 (mt, 2H: NCH₂ of theethyl); 3.34 (t, J=12 Hz, 1H: the other H of the CH₂ in 4 β); 3.54 (mt,1H: the other H of the CH₂ in 3 δ); 4.57 (dd, J=7.5 and 6 Hz, 1H: 3 α);4.76 (broad dd, J=13 and 7.5 Hz, 1H: the other H of the CH₂ in 5 ε);4.84 (mt, 1H: 2 α); 4.89 (dd, J=10 and 1 Hz, 1H: 1 α); 5.21 (dd, J=12and 4 Hz, 1H: 4 α); 5.28 (broad d, J=6 Hz, 1H: 5 α); 5.88 (d, J=9.5 Hz,1H: 6 α); 5.91 (mt, 1H: 1 β); 6.48 (d, J=10 Hz, 1H: NH in 2); 6.60 (d,J=8 Hz, 2H: aromatic H in 4 ε); 7.03 (d, J=8 Hz, 2H: aromatic H in 4 δ);from 7.10 to 7.35 (mt, 5H: aromatic H in 6); 7.47 (limiting AB, 2H: 1′H₄and 1′H₅); 7.89 (mt, 1H: 1′H₆); 8.42 (d, J=10 Hz, 1H: NH in 1); 8.76 (d,J=9.5 Hz, 1H: NH in 6); 11.62 (s, 1H: OH).

EXAMPLE 23 Preparation of the 4ζ-trifluoro-methoxy-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 60erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (R,S)-4-O-trifluoromethyltyrosine hydrochloride, synthesizedas in Example34-8, in water being added at 16 h. At the end of 40 h ofculture, the 1.8 liters of must recovered from the 60 erlenmeyer flasksis extracted with 2 volumes of a mixture consisting of 66% 100 mMphosphate buffer, pH 2.9, and 34% acetonitrile, and then centrifuged.The supernatant is extracted with 2 times [lacun] volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in [lacuna] ml of dichloromethane and injected ontoa silica (30 g) column which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing4ζ-trifluoromethoxy-de(4ζ-dimethylamino)pristinamycin I_(A) are combinedand evaporated. The dry residue is taken up in 7 ml of a mixtureconsisting of 60% of water and 40% acetonitrile and injected in twoportions onto a semi-preparative Nucleosil 7μ C8 10×250 mm (MachereyNagel) column, which is eluted with a mixture consisting of 60% 100 mMphosphate buffer, pH 2.9, and 40% of acetonitrile. The fractionscontaining 4ζ-trifluoromethoxy-de(4ζ-dimethylamino)pristinamycin I_(A)are combined and extracted with one volume of dichloromethane. Theorganic phase is washed with water, dried over sodium sulphate and thenevaporated. 46.5 mg of 4ζ-trifluoromethoxy-de(4ζ-dimethylamino)-pristinamycin I_(A) are obtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.77 (dd, J=16and 5.5 Hz, 1H: 1H of the CH₂ in 5 β); 0.92 (t, J=7.5 Hz, 3H: CH₃ in 2γ); 1.08 (mt, 1H: 1H of the CH₂ in 3 β); from 1.30 to 1.40 (mt, 1H: 1Hof the CH₂ in 3 γ); 1.33 (d, J=7 Hz, 3H: CH₃ in 1 γ); from 1.55 to 1.70(mt, 1H: the other H of the CH₂ in 3 γ); 1.65 and 1.76 (2 mts, 1H each:CH₂ in 2 β); 2.02 (mt, 1H: the other H of the CH₂ in 3 β); 2.11 and 2.40(respectively, mt and broad d, J=16.5 Hz, 1H each: CH₂ in 5 δ); 2.54 (d,J=16 Hz, 1H: the other H of the CH₂ in 5 β); 2.88 (dt, J=13 and 4 Hz,1H: 1H of the CH₂ in 5 ε); 3.08 (dd, J=12 and 5 Hz, 1H: 1H of the CH₂ in4 β); 3.22 (s, 3H: NCH₃); from 3.30 to 3.45 (mt, 1H: 1H of the CH₂ in 3δ); 3.39 (t, J=12 Hz, 1H: the other H of the CH₂ in 4 β); 3.59 (mt, 1H:the other H of the CH₂ in 3 δ); 4.53 (t, J=7.5 Hz, 1H: 3 α); 4.75 (broaddd, J=13 and 8 Hz, 1H: the other H of the CH₂ in 5 ε); 4.85 (mt, 1H: 2α); 4.89 (dd, J=10 and 1.5 Hz, 1H: 1 α); 5.35 (broad d, J=5.5 Hz, 1H: 5α); 5.41 (dd, J=12 and 5 Hz, 1H: 4 α); 5.92 (d, J=10 Hz, 1H: 6 α); 5.93(mt, 1H: 1 β); 6.53 (d, J=9.5 Hz, 1H: NH in 2); from 7.15 to 7.35 (mt,5H: aromatic H in 6); 7.16 (d, J=8 Hz, 2H: aromatic H in 4 ε); 7.26 (d,J=8 Hz, 2H: aromatic H in 4 δ); 7.37 (dd, J=8.5 and 4 Hz, 1H: 1.′H₅);7.42 (dd, J=8.5 and 1.5 Hz, 1H: 1′H₄); 7.70 (dd, J=4 and 1.5 Hz, 1H:1′H₆); 8.37 (d, J=10 Hz, 1H: NH in 1); 8.75 (d, J=10 Hz, 1H: NH in 6);11.66 (s, 1H: OH).

EXAMPLE 24 Preparation of 4ζ-allyloxy-de(4ζ-dimethylamino) pristinamycinI_(A)

Strain SP92::pVRC508 is cultured in production medium using 90erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (S)-4-O-allyltyrosine hydrochloride, synthesized as inExample 33, in 0.1N hydrochloric acid being added at 16 h. At the end of40 h of culture, the 2.7 liters of must recovered from the 90 erlenmeyerflasks is extracted with 2 volumes of a mixture consisting of 66% 100 mMphosphate buffer, pH 2.9, and 34% acetonitrile, and then centrifuged.The supernatant is extracted with 2 times 0.5 volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing 4ζ-allyloxy-de(4ζ-dimethyl -amino)pristinamycinI_(A) are combined and evaporated. The dry residue is taken up in 7 mlof a mixture consisting of 60% of water and 40% acetonitrile andinjected onto a semi-preparative Nucleosil 7μ C8 10×250 mm (MachereyNagel) column, which is eluted with a mixture consisting of 52% 100 mMphosphate buffer, pH 2.9, and 48% of acetonitrile. The fractionscontaining 4ζ-allyloxy-de(4ζ-dimethylamino)pristinamycin I_(A) arecombined and extracted with one volume of dichloromethane. The organicphase is washed with water, dried over sodium sulphate and thenevaporated. 29 mg of 4ζ-allyloxy-de(4ζ-dimethylamino)pristinamycin I_(A)are obtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS):0.63 (dd, J=16 and6 Hz, 1H: 1H of CH₂ in 5 β); 0.91 (t, J=7.5 Hz, 3H: CH₃ in 2 γ); 1.13(mt, 1H: 1H of CH₂ in 3 β); 1.29 (mt, 1H: 1H of CH₂ in 3 γ); 1.33 (d,J=6.5 Hz, 3H: CH₃ in 1 γ); 1.57 (mt, 1H: the other H of the CH₂ in 3 γ);1.65 and 1.74 (2 mts, 1H each: CH₂ in 2 β); 2.02 (mt, 1H: the other H ofthe CH₂ in 3 β); 2.14 and 2.34 (respectively, mt and broad d, J=16.5 Hz,1H each: CH₂ in 5 δ); 2.43 (d, J=16 Hz, 1H: the other H of the CH₂ in 5β); 2.85 (dt, J=13 and 4 Hz, 1H: 1H of the CH₂ in 5 ε); 2.95 (dd, J=12and 4 Hz, 1H: 1H of the CH₂ in 4 β); 3.25 (s, 3H: NCH₃); 3.33 (mt, 1H:1H of the CH₂ in 3 δ): 3.36 (t, J=12 Hz, 1H: the other H of the CH₂ in 4β); 3.56 (mt, 1H: the other H of the CH₂ in 3 δ); 4.51 (limiting AB, 2H:OCH₂ of the allyl); 4.56 (t, J=7.5 Hz, 1H: 3 α); 4.75 (broad dd, J=13and 8 Hz, 1H: the other H of the CH₂ in 5 ε); 4.84 (mt, 1H: 2 α); 4.88(dd, J=10 and 1 Hz, 1H: 1 α); 5.27 (dd, J=12 and 4 Hz, 1H: 4 α); 5.32(broad d, J=6 Hz, 1H: 5 α); 5.30 and 5.40 (respectively, mt and dd, J=17and 1.5 Hz, 1H each: ═CH₂ of the allyl); 5.89 (d, J=9.5 Hz, 1H: 6 α);5.91 (mt, 1H: 1 β); 6.02 (mt, 1H: CH═ of the allyl); 6.50 (d, J=10 Hz,1H: NH in 2); 6.85 (d, J=8 Hz, 2H: aromatic H in 4 ε); 7.12 (d, J=8 Hz,2H: aromatic H in 4 δ); from 7.10 to 7.35 (mt, 5H: aromatic H in 6);7.45 (dd, J=8.5 and 1.5 Hz, 1H: 1′H₄); 7.57 (dd, J=8.5 and 4 Hz, 1H:1′H₅); 7.77 (dd, J=4 and 1.5 Hz, 1H: 1′H₆); 8.41 (d, J=10 Hz, 1H: NH in1); 8.74 (d, J=9.5 Hz, 1H: NH in 6); 11.63 (s, 1H: OH).

EXAMPLE 25 Preparation of 4ζ-ethoxy-de(4ζ-dimethylamino)pristinamycinI_(A)

Strain SP92::pVRC508 is cultured in production medium using 90erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (S)-4-O-ethyltyrosine hydrochloride, synthesized as inExample 33, in 0.1N hydrochloric acid being added at 16 h. At the end of40 h of culture, the 2.7 liters of must recovered from the 90 erlenmeyerflasks is extracted with 2 volumes of a mixture consisting of 66% 100 mMphosphate buffer, pH 2.9, and 34% acetonitrile, and then centrifuged.The supernatant is extracted with 2 times 0.5 volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing 4ζ-ethoxy-de(4ζ-dimethyl -amino)pristinamycinI_(A) are combined and evaporated. The dry residue is taken up in 7 mlof a mixture consisting of 60% of water and 40% acetonitrile andinjected onto a semi-preparative Nucleosil 7μ C8 10×250 mm (MachereyNagel) column, which is eluted with a mixture consisting of 52% 100 mMphosphate buffer, pH 2.9, and 48% of acetonitrile. The fractionscontaining 4ζ-ethoxy-de(4ζ-dimethylamino)pristinamycin I_(A) arecombined and extracted with one volume of dichloromethane. The organicphase is washed with water, dried over sodium sulphate and thenevaporated. 29 mg of 4ζ-ethoxy-de(4ζ-dimethylamino)pristinamycin I_(A)are obtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.64 (dd, J=16and 5.5 Hz, 1H: 1H of the CH₂ in 5 γ); 0.90 (t, J=7.5 Hz, 3H: CH₃ in 2γ); 1.12 (mt, 1H: 1H of the CH₂ in 3 β); 1.25 (mt, 1H: 1H of the CH₂ in3 γ); 1.33 (d, J=7 Hz, 3H: CH₃ in 1 γ); 1.42 (t, J=7 Hz, 3H: CH₃ of theethyl); 1.57 (mt, 1H: the other H of the CH₂ in 3 γ); 1.63 and 1.74 (2mts, 1H each: CH₂ in 2 β); 2.02 (mt, 1H: the other H of the CH₂ in 3 β);2.16 and 2.35 (respectively mt and broad d, J=16.5 Hz, 1H each: CH₂ in 5δ); 2.43 (d, J=16 Hz, 1H: the other H of the CH₂ in 5 β); 2.83 (dt, J=13and 4 Hz, 1H: 1H of the CH₂ in 5 ε); 2.93 (dd, J=12 and 4 Hz, 1H: 1H ofthe CH₂ in 4 β); from 3.15 to 3.30 (mt, 1H: 1H of the CH₂ in 3 δ); 3.24(s, 3H: NCH₃); 3.35 (t, J=12 Hz, 1H: the other H of the CH₂ in 4 β);3.55 (mt, 1H: the other H of the CH₂ in 3 δ); 3.95 (limiting AB, 2H:OCH₂ of the ethyl); 4.56 (dd, J=7.5 and 6 Hz, 1H: 3 α); 4.75 (broad dd,J=13 and 8 Hz, 1H: the other H of the CH₂ in 5 ε); 4.84 (mt, 1H: 2 α);4.87 (dd, J=10 and 1 Hz, 1H: 1 α); 5.26 (dd, J=12 and 4 Hz, 1H: 4 α);5.32 (broad d, J=5.5 Hz, 1H: 5 α); 5.88 (d, J=10 Hz, 1H: 6 α); 5.92 (mt,1H: 1 β); 6.48 (d, J=10 Hz, 1H: NH in 2); 6.83 (d, J=8 Hz, 2H: aromaticH in 4 ε); 7.10 (d, J=8 Hz, 2H: aromatic H in 4 δ); from 7.10 to 7.35(mt, 5H: aromatic H in 6); 7. 44 (dd _(,) J=8.5 and 1.5 Hz, 1H: 1′H₄);7.57 (dd, J=8.5 and 4.5 Hz, 1H: 1′H₅); 7.77 (dd, J=4.5 and 1.5 Hz, 1H:1′H₆); 8.38 (d, J=10 Hz, 1H: NH in 1); 8.75 (d, J=10 Hz, 1H: NH in 6);11.60 (s, 1H: OH).

EXAMPLE 26 Preparation of 4ζ-(2-chloro-ethoxy)-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92t:pVRC508 is cultured in production medium using 60erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (S)-4-O-(2-chloroethyl)tyrosine hydrochloride, synthesizedas in Example 42-1, in water being added at 16 h. At the end of 40 h ofculture, the 1.8 liters of must recovered from the 60 erlenmeyer flasksis extracted with 2 volumes of a mixture consisting of 66% 100 mMphosphate buffer, pH 2.9, and 34% acetonitrile, and then centrifuged.The supernatant is extracted with 2 times 0.5 volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing4ζ-(2-chloroethoxy)-de(4ζ-dimethylamino)pristinamycin I_(A) are combinedand evaporated. The dry residue is taken up in 7 ml of a mixtureconsisting of 60% of water and 40% acetonitrile and injected onto asemi-preparative Nucleosil 7μ C8 10×250 mm (Macherey Nagel) column,which is eluted with a mixture consisting of 60% 100 mM phosphatebuffer, pH 2.9, and 40% of acetonitrile. The fractions containing4ζ-(2-chloroethoxy)-de(4ζ-dimethylamino)pristinamycin I_(A) are combinedand extracted with one volume of dichloromethane. The organic phase iswashed with water, dried over sodium sulphate and then evaporated. 3.2mg of 4ζ-(2-chloroethoxy)-de(4ζ-dimethylamino) -pristinamycin I_(A) areobtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.66 (dd, J=16and 5.5 Hz, 1H: 1H of the CH₂ in 5 β); 0.91 (t, J=7.5 Hz, 3H: CH₃ in 2γ); 1.13 (mt, 1H: 1H of the CH₂ in 3 β); 1.28 (mt, 1H: 1H of the CH₂ in3 γ); 1.33 (d, J=7 Hz, 3H: CH₃ in 1 γ); 1.57 (mt, 1H: the other H of theCH₂ in 3 γ); 1.66 and 1.76 (2 mts, 1H each: CH₂ in 2 β); 2.02 (mt, 1H:the other H of the CH₂ in 3 β); 2.16 and 2.37 (respectively, mt andbroad d, J=16.5 Hz, 1H each: CH₂ in 5 δ): 2.47 (d, J=16 Hz, 1H: theother H of the CH₂ in 5 β); 2.86 (dt, J=13 and 4 Hz, 1H: 1H of the CH₂in 5 ε); 2.95 (dd, J=12 and 4 Hz, 1H: 1H of the CH₂ in 4 β); 3.23 (s,3H: NCH₃); 3.32 (mt, 1H: 1H of the CH₂ in 3 δ); 3.37 (t, J=12 Hz, 1H:the other H of the CH₂ in 4 β); 3.57 (mt, 1H: the other H of the CH₂ in3 δ); 3.82 (t, J=6 Hz, 2H: CH₂Cl); 4.19 (limiting AB, 2H: OCH₂ of theethyl); 4.55 (dd, J=7.5 and 7 Hz, 1H: 3 α); 4.75 (broad dd, J=13 and 8Hz, 1H: the other H of the CH₂ in 5 ε); 4.84 (mt, 1H: 2 α); 4.87 (broadd, J=10 Hz, 1H: 1 α); 5.28 (dd, J=12 and 4 Hz, 1H: 4 α); 5.32 (broad d,J=5.5 Hz, 1H: 5 α); 5.88 (d, J=10 Hz, 1H: 6 α); 5.90 (mt, 1H: 1 β); 6.50(d, J=10 Hz, 1H: NH in 2); 6.86 (d, J=8 Hz, 2H: aromatic H in 4 ε); 7.13(d, J=8 Hz, 2H: aromatic H in 4 δ); from 7.10 to 7.35 (mt, 5H: aromaticH in 6); 7.45 (limiting AB, 2H: 1′H₄ and 1′H₅); 7.75 (dd, J=4 and 2 Hz,1H: 1′H₅); 8.38 (d, J=10 Hz, 1H: NH in 1); 8.74 (d, J=10 Hz, 1H: NH in6); 11.62 (s, 1H: OH).

EXAMPLE 27 Preparation of 4ζ-acetyl-de 4ζ-dimethylamino)pristinamycinI_(A)

Strain SP92::pVRC508 is cultured in production medium using 60erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (S)-4-acetylphenylalanine, synthesized as in Example 33, in0.1N sodium hydroxide solution being added at 16 h. At the end of 40 hof culture, the 1.8 liters of must recovered from the 60 erlenmeyerflasks is extracted with 2 volumes of a mixture consisting of 66% 100 mMphosphate buffer, pH 2.9, and 34% acetonitrile, and then centrifuged.The supernatant is extracted with 2 times 0.5 volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing 4ζ-acetyl)-de(4ζ-dimethyl -amino)pristinamycinI_(A) are combined and evaporated. The dry residue is taken up in 7 mlof a mixture consisting of 60% of water and 40% acetonitrile andinjected onto a semi-preparative Nucleosil 7μ C8 10×250 mm (MachereyNagel) column, which is eluted with a mixture consisting of 60% 100 mMphosphate buffer, pH 2.9, and 40% of acetonitrile. The fractionscontaining 4ζ-acetyl-de(4ζ-dimethylamino)pristinamycin I_(A) arecombined and extracted with one volume of dichloromethane. The organicphase is washed with water, dried over sodium sulphate and thenevaporated. 4.2 mg of 4ζ-acetyl -de(4ζ-dimethylamino)pristinamycin I_(A)are obtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.73 (dd, J=16and 6 Hz, 1H: 1H of the CH₂ in 5 β); 0.93 (t, J=7.5 Hz, 3H: CH₃ in 2 γ);1.12 (mt, 1H: 1H of the CH₂ in 3 β); from 1.25 to 1.45 (mt, 1H: 1H ofthe CH₂ in 3 γ); 1.33 (d, J=7 Hz, 3H: CH₃ in 1 γ); 1.62 (mt, 1H: theother H of the CH₂ in 3 γ); from 1.60 to 1.85 (mt, 2H: CH₂ in 2 β); 2.02(mt, 1H: the other H of the CH₂ in 3 β); 2.20 and 2.42 (respectively, mtand broad d, J=16.5 Hz, 1H each: CH₂ in 5 δ); 2.52 (d, J=16 Hz, 1H: theother H of the CH₂ in 5 β); 2.60 (s, 3H: ArCOCH₃); 2.88 (dt, J=13 and4.5 Hz, 1H: 1H of CH₂ in 5 ε); 3.13 (dd, J=13.5 and 5.5 Hz, 1H: 1H ofthe CH₂ in 4 β); 3.21 (s, 3H: NCH₃); from 3.30 to 3.50 (mt, 1H: theother H of the CH₂ in 4 β); from 3.30 to 3.50 and 3.63 (2 mts, 1H each:CH₂ in 3 δ); 4.53 (t, J=7.5 Hz, 1H: 3 α); 4.75 (broad dd, J=13 and 8 Hz,1H: the other H of the CH₂ in 5 ε); 4.84 (mt, 1H: 2 α); 4.88 (dd, J=10and 1 Hz, 1H: 1 α); 5.35 (broad d, J=6 Hz, 1H: 5 α); 5.43 (dd, J=10. 5and 4 Hz, 1H: 4 α); 5.90 (d, J=9.5 Hz, 1H: 6 α); 5.92 (mt, 1H: 1 β);6.56 (d, J=9.5 Hz, 1H: NH in 2); from 7.10 to 7.35 (mt, 5H: aromatic Hin 6); 7.28 (d, J=8 Hz, 2H: aromatic H in 4 δ); 7.38 (dd, J=8.5 and 2Hz, 1H: 1′H₄); 7.42 (dd, J=8.5 and 4.5 Hz, 1H: 1′H₅); 7.66 (dd, J=4.5and 2 Hz, 1H: 1′H₆); 7.88 (d, J=8 Hz, 2H: aromatic H in 4 ε); 8.38 (d,J=10 Hz, 1H: NH in 1); 8.74 (d, J=9.5 Hz, 1H: NH in 6); 11.65 (s, 1H:OH).

EXAMPLE 28 Preparation of 4ε-dimethylamino-de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 60erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (R,S)-3-dimethylaminophenylalanine dihydrochloride,synthesized as in Example 35-10, in 0.1N sodium hydroxide solution beingadded at 16 h. At the end of 40 h of culture, the 1.8 liters of mustrecovered from the 60 erlenmeyer flasks is extracted with 2 volumes of amixture consisting of 66% 100 mM phosphate buffer, pH 2.9, and 34%acetonitrile, and then centrifuged. The supernatant is extracted with 2times 0.5 volumes of dichloromethane. The chloromethylene phases arewashed with water and then combined, dried over sodium sulphate andevaporated. The dry extract is taken up in 20 ml of dichloromethane andinjected onto a silica (30 g) column which is mounted in dichloromethaneand eluted successively with plateaus of from 0 to 10% methanol indichloromethane. The fractions containing4ε-dimethylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are combinedand evaporated. The dry residue is taken up in 3 ml of a mixtureconsisting of 60% of water and 40% acetonitrile and injected onto asemi-preparative Nucleosil 7μ C8 10×250 mm (Macherey Nagel) column,which is eluted with a mixture consisting of 57% 100 mM phosphatebuffer, pH 2.9, and 43% of acetonitrile. The fractions containing4ε-dimethylamino-de(4ζ-dimethylamino)pristinamycin I_(A) are combinedand extracted with one volume of dichloromethane. The organic phase iswashed with water, dried over sodium sulphate and then evaporated. 1.1mg of 4ε-dimethyl -amino-de(4ζ-dimethylamino)pristinamycin I_(A) areobtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.63 (dd, J=16and 5 Hz, 1H: 1H of the CH₂ in 5 β); 0.91 (t, J=7.5 Hz, 3H: CH₃ in 2 γ);1.13 (mt, 1H: 1H of the CH₂ in 3 β); from 1.20 to 1.35 (mt, 1H: 1H ofthe CH₂ in 3 γ); 1.32 (d, J=6.5 Hz, 3H: CH₃ in 1 γ); 1.57 (mt, 1H: theother H of the CH₂ in 3 γ); 1.63 and 1.76 (2 mts, 1H each: CH₂ in 2 β);2.02 (mt, 1H: the other H of the CH₂ in 3 β); 2.08 and 2.31(respectively, mt and broad d, J=16.5 Hz, 1H each: CH₂ in 5 δ): 2.35 (d,J=16 Hz, 1H: the other H of the CH₂ in 5 β); 2.81 (dt, J=13 and 4 Hz,1H: 1H of the CH₂ in 5 ε); 2.90 (s, 6H: N(CH₃)₂); 2.97 (dd, J=12 and 4Hz, 1H: 1H of the CH₂ in 4 β); from 3.20 to 3.30 (mt, 1H: 1H of the CH₂in 3 δ); 3.28 (s, 3H: NCH₃); 3.37 (t, J=12 Hz, 1H: the other H of theCH₂ in 4 β); 3.57 (mt, 1H: the other H of the CH₂ in 3 δ); 4.58 (t,J=7.5 Hz, 1H: 3 α); 4.74 (broad dd, J=13 and 8 Hz, 1H: the other H ofthe CH₂ in 5 ε); 4.86 (mt, 1H: 2 α); 4.89 (broad d, J=10 Hz, 1H: 1 α);5.27 (dd, J=12 and 4 Hz, 1H: 4 α); 5.29 (broad d, J=5 Hz, 1H: 5 α); 5.89(d, J=9.5 Hz, 1H: 6 α); 5.90 (mt, 1H: 1 β); 6.50 (d, J=10 Hz, 1H: NH in2); from 6.50 to 6.70 (mt, 3H: aromatic Hs in the ortho and in the parapositions with respect to the dimethylamino); from 7.15 to 7.35 (mt, 5H:aromatic Hs in 6); 7.20 (t, J=8 Hz, 1H: aromatic H in the meta positionwith respect to the dimethylamino); 7.43 (limiting AB, 2H: 1′H₄ and1′H₅); 7.82 (mt, 1H: 1′H₆); 8.38 (d, J=10 Hz, 1H: NH in 1); 8.73 (d,J=9.5 Hz, 1H: NH in 6); 11.61 (s, 1H: OH).

EXAMPLE 29

Preparation of 4ε-methylthio -de(4ζ-dimethylamino)pristinamycin I_(A)

Strain SP92::pVRC508 is cultured in production medium using 56erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (R,S)-3-methylthiophenyl -alanine hydrochloride, synthesizedas in Example 34-11, in 0.1N sodium hydroxide solution being added at 16h. At the end of 40 h of culture, the 1.68 liters of must recovered fromthe 56 erlenmeyer flasks is extracted with 2 volumes of a mixtureconsisting of 66% 100 mM phosphate buffer, pH 2.9, and 34% acetonitrile,and then centrifuged. The supernatant is extracted with 2 times 0.5volumes of dichloromethane. The chloromethylene phases are washed withwater and then combined, dried over sodium sulphate and evaporated. Thedry extract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing the novel derivative of pristinamycin I_(A) arecombined and evaporated. The dry residue is taken up in 7 ml of amixture consisting of 54% of water and 46% acetonitrile and injectedonto a semi-preparative Nucleosil 7μ C8 10×250 mm (Macherey Nagel)column, which is eluted with a mixture consisting of 55% 100 mMphosphate buffer, pH 2.9, and 45% of acetonitrile. The fractionscontaining the novel pristinamycin are combined and extracted with onevolume of dichloromethane. The organic phase is washed with water, driedover sodium sulphate and then evaporated. 20 mg of4ε-methylthio-de(4ζ-dimethyl -amino)pristinamycin I_(A) are obtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.56 (dd, J=16and 5.5 Hz, 1H: 1H of the CH₂ in 5 β); 0.90 (t, J=7.5 Hz, 3H: CH₃ in 2γ); 1.13 (mt, 1H: 1H of the CH₂ in 3 β); 1.28 (mt, 1H: 1H of the CH₂ in3 γ); 1.32 (d, J=6.5 Hz, 3H: CH₃ in 1 γ); 1.58 (mt, 1H: the other H ofthe CH₂ in 3 γ); 1.62 and 1.74 (2 mts, 1H each: CH₂ in 2 β); 2.02 (mt,1H: the other H of the CH₂ in 3 β); 2.25 and 2.35 (respectively, mt andbroad d, J=16.5 Hz, 1H each: CH₂ in 5 δ); 2.39 (d, J=16 Hz, 1H: theother H of the CH₂ in 5 β); 2.43 (s, 3H: SCH₃); 2.82 (dt, J=13 and 4 Hz,1H: 1H of the CH₂ in 5 ε); 2.98 (dd, J=12 and 4.5 Hz, 1H: 1H of the CH₂in 4 β); 3.26 (s, 3H: NCH₃); 3.30 (t, J=12 Hz 1H: 1H of CH₂ in 3 δ);3.38 (mt, 1H: the other H of the CH₂ in 4 β); 3.57 (mt, 1H: the other Hof the CH₂ in 3 δ); 4.56 (t, J=7.5 Hz, 1H: 3 α); 4.74 (broad dd, J=13and 8 Hz, 1H: the other H of the CH₂ in 5 ε); 4.84 (mt, 1H: 2 α); 4.89(dd, J=10 and 1 Hz, 1H: 1 α); 5.29 (dd, J=12 and 4.5 Hz, 1H: 4 α); 5.32(broad d, J=5.5 Hz, 1H: 5 α); 5.88 (d, J=9.5 Hz, 1H: 6 α); 5.90 (mt, 1H:1 β); 6.51 (d, J=10 Hz, 1H: NH in 2); 6.99 (broad d, J=8 Hz, 1H:aromatic H in the para position with respect to the methylthio); 7.10and 7.15 (respectively, broad s and broad d, J=8 Hz, 1H each: aromaticHs in the ortho position with respect to the methylthio); from 7.15 to7.35 (mt, 6H: aromatic Hs in 6 and aromatic Hs in the meta position withrespect to the methylthio); 7.43 (broad d, J=8 Hz, 1H: 1′H₄); 7.52 (dd,J=8 and 4 Hz, 1H: 1′H₅); 7.79 (broad d, J=4 Hz, 1H: 1′H₆); 8.38 (d, J=10Hz, 1H: NH in 1); 8.73 (d, J=9.5 Hz, 1H: NH in 6); 11.62 (s, 1H: OH).

EXAMPLE 30 Preparation of 4ε-ethoxy-de(4ζ-dimethylamino)pristinamycinI_(A)

Strain SP92::pVRC508 is cultured in production medium using 60erlenmeyer flasks, as described in Example 3, with 1 ml of a 20 g/lsolution of (S)-3-O-ethyltyrosine hydrochloride, synthesized as inExample 37-1, in 0.2N sodium hydroxide solution being added at 16 h. Atthe end of 40 h of culture, the 1.8 liters of must recovered from the 60erlenmeyer flasks is extracted with 2 volumes of a mixture consisting of66% 100 mM phosphate buffer, pH 2.9, and 34% acetonitrile, and thencentrifuged. The supernatant is extracted with 2 times 0.5 volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing the novel derivative of pristinamycin I_(A) arecombined and evaporated. 19 mg of dry residue are obtained. The latteris taken up in 3 ml of a mixture consisting of 60% of water and 40%acetonitrile and injected onto a semi-preparative Nucleosil 7μ C8 10×250mm (Macherey Nagel) column, which is eluted with a mixture consisting of60% 100 mM phosphate buffer, pH 2.9, and 40% of acetonitrile. Thefractions containing the novel pristinamycin are combined and extractedwith one volume of dichloromethane. The organic phase is washed withwater, dried over sodium sulphate and then evaporated. 15.8 mg of4ε-O-ethoxy-de(4ζ-dimethyl -amino)pristinamycin I_(A) are obtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.55 (dd, J=16and 5.5 Hz, 1H: 1H of the CH₂ in 5 β); 0.90 (t, J=7.5 Hz, 3H: CH₃ in 2γ); 1.12 (mt, 1H: 1H of the CH₂ in 3 β); 1.20 (mt, 1H: 1H of the CH₂ in3 γ); 1.31 (d, J=6.5 Hz, 3H: CH₃ in 1 γ); 1.49 (t, J=7 Hz, 3H: CH₃ ofthe ethyl); 1.54 (mt, 1H: the other H of the CH₂ in 3 γ); 1.63 and 1.73(2 mts, 1H each: CH₂ in 2 β); 2.02 (mt, 1H: the other H of the CH₂ in 3β); 2.22 and 2.33 (respectively, mt and broad d, J=16.5 Hz, 1H each: CH₂in 5 δ); 2.46 (d, J=16 Hz, 1H: the other H of the CH₂ in 5 β); 2.83 (dt,J=13 and 4 Hz, 1H: 1H of the CH₂ in 5 ε); 2.95 (dd, J=12 and 4 Hz, 1H:1H of the CH₂ in 4 β); 3.22 (mt, 1H: 1H of the CH₂ in 3 δ); 3.27 (s, 3H:NCH₃); 3.39 (t, J=12 Hz, 1H: the other H of the CH₂ in 4 β); 3.53 (mt,1H: the other H of the CH₂ in 3 δ); 3.93 and 4.03 (2 mts, 1H each: OCH₂of the ethyl); 4.56 (dd, J=7 and 5.5 Hz, 1H: 3 α); 4.75 (broad dd, J=13and 8 Hz, 1H: the other H of the CH₂ in 5 ε); 4.82 (mt, 1H: 2 α); 4.88(dd, J=10 and 1 Hz, 1H: 1 α); 5.23 (dd, J=12 and 4 Hz, 1H: 4 α); 5.23(broad d, J=5.5 Hz, 1H: 5 α); 5.87 (d, J=9.5 Hz, 1H: 6 α); 5.92 (mt, 1H:1 β); 6.47 (d, J=10 Hz, 1H: NH in ²); 6.80 (mt, 3H: aromatic H in theortho and in the para positions with respect to the ethoxy); from 7.10to 7.35 (mt, 6H: aromatic Hs in 6 and aromatic Hs in the meta positionwith respect to the ethoxy); 7.43 (dd, J=8 and 1 Hz, 1H: 1′H_(A)); 7.50(dd, J=8 and 4 Hz, 1H: 1′H₅); 7.77 (dd, J=4 and 1 Hz, 1H: 1′H₆); 8.38(d, J=10 Hz, 1H: NH in 1); 8.70 (d, J=9.5 Hz, 1H: NH in 6); 11.60 (s,1H: OH).

EXAMPLE 31 Preparation of 4ζ-ethylthio-de (4ζdimethylamino)pristinamycinI_(A)

Strain SP92::pVRC508 is cultured in production medium using 2 erlenmeyerflasks, as described in Example 3, with 1 ml of a 20 g/l solution of(S)-4-ethylthiophenylalanine hydrochloride, synthesized as in Example33, in 0.1N sodium hydroxide solution being added at 16 h. At the end of40 h of culture, the 60 ml of must recovered from the 2 erlenmeyerflasks is extracted with 2 volumes of a mixture consisting of 66% 100 mMphosphate buffer, pH 2.9, and 34% acetonitrile, and then centrifuged.The supernatant is extracted with 2 times 0.5 volumes ofdichloromethane. The chloromethylene phases are washed with water andthen combined, dried over sodium sulphate and evaporated. The dryextract is taken up in 20 ml of dichloromethane and injected onto asilica (30 g) column which is mounted in dichloromethane and elutedsuccessively with plateaus of from 0 to 10% methanol in dichloromethane.The fractions containing 4ζ-ethylthio-de(4ζ-dimethylamino)pristinamycinI_(A) are combined and evaporated. The dry residue is taken up in 7 mlof a mixture consisting of 60% of water and 40% acetonitrile andinjected onto a semi-preparative Nucleosil 7μ C8 10×250 mm (MachereyNagel) column, which is eluted with a mixture consisting of 52% 100 mMphosphate buffer, pH 2.9, and 48% of acetonitrile. The fractionscontaining 4ζ-ethylthio-de(4ζ-dimethylamino) -pristinamycin I_(A) arecombined and extracted with one volume of dichloromethane. The organicphase is washed with water, dried over sodium sulphate and thenevaporated. ? mg of 4ζ-ethylthio-de(4ζ-dimethylamino) -pristinamycinI_(A) are obtained.

NMR spectrum. 1H (400 MHz, CDCl₃, δ in ppm): 0.68 (dd, J=16 and 6 Hz,1H: 1H of the CH₂ in 5 β); 0.92 (t, J=7.5 Hz, 3H: CH₃ in 2 γ); from 1.10to 1.40 (mt, 5H: 1H of the CH₂ in 3 β and 1H of the CH₂ in 3 γ and CH₃of the ethyl); 1.32 (d, J=7 Hz, 3H: CH₃ in 1 γ); from 1.45 to 1.85 (mt,3H: the other H of the CH₂ in 3 γ and CH₂ in 2 β); 2.02 (mt, 1H: theother H of the CH₂ in 3 β); 2.18 and 2.37 (respectively, mt and broad d,J=16.5 Hz, 1H each: CH₂ in 5 δ); 2.45 (broad d, J=16 Hz, 1H: the other Hof the CH₂ in 5 β); 2.85 (dt, J=13 and 4 Hz, 1H: 1H of the CH₂ in 5 ε);2.90 (mt, 2H: ArSCH₂ ethyl); 2.98 (dd, J=12 and 4 Hz, 1H: 1H of the CH₂in 4 β); 3.25 (s, 3H: NCH₃); 3.35 (mt, 1H: 1H of the CH₂ in 3 δ); 3.39(t, J=12 Hz, 1H: the other H of the CH₂ in 4 β); 3.57 (mt, 1H: the otherH of the CH₂ in 3 δ); 4.55 (t, J=7.5 Hz, 1H: 3 α); 4.75 (broad dd, J=13and 7.5 Hz, 1H,: the other H of the CH₂ in 5 ε); 4.85 (mt, 1H: 2 α);4.89 (dd, J=10 and 1 Hz, 1H: 1 α); from 5.25 to 5.40 (mt, 2H: 5 α and 4α); 5.88 (d, J=9.5 Hz, 1H: 6 α); 5.91 (mt, 1H: 1 β); 6.55 (d, J=9.5 Hz,1H: NH in 2); 7.10 (d, J=8 Hz, 2H: aromatic Hs in 4 δ); from 7.10 to7.35 (mt, 7H: aromatic Hs in 6 and 4 ε); 7.44 (limiting AB, 2H: 1′H₄ and1′H₅); 7.74 (mt, 1H: 1′H₆); 8.38 (d, J=10 Hz, 1H: NH in 1); 8.75 (d,J=9.5 Hz, 1H: NH in 6); 11.62 (s, 1H: OH).

EXAMPLE 32 Preparation of 4ζ-ethyl-de(4ζ-dimethylamino) pristinamycinI_(A)

Strain SP92::pVRC508 is cultured in production medium using 2 erlenmeyerflasks, as described in Example 3, with 1 ml of a 20 g/l solution of(R,S)-4-ethylphenylalanine, synthesized as in Example 33, in 0.1N sodiumhydroxide solution being added at 16 h. At the end of 40 h of culture,the 60 ml of must recovered from the 2 erlenmeyer flasks is extractedwith 2 volumes of a mixture consisting of 66% 100 mM phosphate buffer,pH 2.9, and 34% acetonitrile, and then centrifuged. The supernatant isextracted with 2 times [lacuna] volumes of dichloromethane. Thechloromethylene phases are washed with water and then combined, driedover sodium sulphate and evaporated. The dry extract is taken up in 20ml of dichloromethane and injected onto a silica (30 g) column which ismounted in dichloromethane and eluted successively with plateaus of from0 to 10% methanol in dichloromethane. The fractions containing4ζ-ethyl-de(4ζ-dimethyl -amino)pristinamycin I_(A) are combined andevaporated. The dry residue is taken up in 7 ml of a mixture consistingof 52% of water and 48% acetonitrile and injected onto asemi-preparative Nucleosil 7μ C8 10×250 mm (Macherey Nagel) column,which is eluted with a mixture consisting of 52% 100 mM phosphatebuffer, pH 2.9, and 48% of acetonitrile. The fractions containing4ζ-ethyl -de(4ζ-dimethylamino)pristinamycin I_(A) are combined andextracted with one volume of dichloromethane. The organic phase iswashed with water, dried over sodium sulphate and then evaporated. 0.50mg of 4ζ-ethyl -de(4ζ-dimethylamino)pristinamycin I_(A) are obtained.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm, ref. TMS): 0.42 (dd, J=16and 5.5 Hz, 1H: 1H of the CH₂ in 5 β); 0.92 (t, J=7.5 Hz, 3H: CH₃ in 2γ); from 1.10 to 1.40 (mt, 2H: 1H of the CH₂ in 3 β and 1H of the CH₂ in3 γ); 1.23 (t, J=7.5 Hz, 3H: CH₃ of the ethyl); 1.35 (d, J=7 Hz, 3H: CH₃in 1 γ); from 1.45 to 1.85 (mt, 3H: the other H of the CH₂ in 3 γ andCH₂ in 2 β); 2.02 (mt, 1H: the other H of the CH₂ in 3 β); 2.15 and from2.25 to 2.40 (2 mts, 1H each: CH₂ in 5 δ); from 2.25 to 2.40 (mt, 1H:the other H of the CH₂ in 5 β); 2.60 (q, J=7.5 Hz, 2H: ArCH₂ of theethyl); 2.83 (dt, J=13 and 4 Hz, 1H: 1H of the CH₂ in 5 ε); 2.98 (dd,J=12 and 4 Hz, 1H: 1H of the CH₂ in 4 β); from 3.25 to 3.35 (mt, 1H: 1Hof the CH₂ in 3 δ); 3.27 (s, 3H: NCH₃); 3.39 (t, J=12 Hz, 1H: the otherH of the CH₂ in 4 β); 3.59 (mt, 1H: the other H of the CH₂ in 3 δ); 4.58(dd, J=7 and 6.5 Hz, 1H: 3 α); 4.75 (broad dd, J=13 and 8 Hz, 1H: theother H of the CH₂ in 5 ε); 4.87 (mt, 1H: 2 α); 4.89 (dd, J=10 and 1 Hz,1H: 1 α); 5.24 (broad d, J=5.5 Hz, 1H: 5 α); 5.29 (dd, J=12 and 4 Hz,1H: 4 α); 5.88 (d, J=10 Hz, 1H: 6 α); 5.92 (mt, 1H: 1 β); 6.73 (d, J=10Hz, 1H: NH in 2); from 7.10 to 7.35 (mt, 9H: aromatic Hs in 6-4 ε and 4δ); 7.44 (dd, J=8.5 and 1.5 Hz, 1H: 1′H₄); 7.50 (dd, J=8.5 and 4.5 Hz,1H: 1′H₅); 7.80 (dd, J=4.5 and 1.5 Hz, 1H: 1′H₆); 8.38 (d, J=10 Hz, 1H:NH in 1); 8.75 (d, J=10 Hz, 1H: NH in 6); 11.66 (s, 1H: OH).

Using the same fractions derived from the silica column described above,which fractions also contain the novel pristinamycin I_(H) derivative,0.3 mg of ¢-ethyl-de(4ζ-dimethylamino)pristinamycin I_(H) is isolated bycarrying out semi-preparative column chromatography as described above.

NMR spectrum. ¹H (400 MHz, CDCl₃, δ in ppm): 0.04 (mt 1H: 1H of the CH₂in 5 β); 0.92 (t, J=7.5 Hz, 3H: CH₃ in 2 δ); from 1.10 to 1.40 (mt, 2H:1H of the CH₂ in 5 δ and 1H of the CH₂ in 5 γ); 1.18 (t, J=7.5 Hz, 3H:CH₃ of the ethyl); 1.30 (d, J=6.5 Hz, 3H: CH₃ in 1 γ); from 1.45 to 1.85(mt, 7H: the other H of the CH₂ in 5 γ- the other H of the CH₂ in 5 δ-1Hof the CH₂ in 3 β-CH₂ in 3 γ and CH₂ in 2 β); 1.81 (broad d, J=13 Hz,1H: the other H of the CH₂ in 5 β); 2.02 (mt, 1H: the other H of the CH₂in 3 β); 2.40 (dt, J=13 and 4 Hz, 1H: 1H of the CH₂ in 5 ε); 2.65 (q,J=7.5 Hz, 2H: ArCH₂ of the ethyl); 2.97 and 3.09 (respectively, dd andt, J=12 and 5 Hz and J=12 Hz, 1H each: CH₂ in 4 β); 3.50 and 3.60 (2mts, 1H each: CH₂ in 3 δ); 4.13 (dd, J=8 and 5 Hz, 1H: 3 α); 4.49 (broadd, J=13 Hz, 1H: the other H of the CH₂ in 5 ε); 4.70 (mt, 2H: 5 α and 4α), 4.77 (mt, 1H: 2 α); 4.83 (dd, J=10 and 1 Hz, 1H: 1 α); 5.50 (d, J=7Hz, 1H: 6 α); 5.74 (mt, 1H: 1 β); 6.09 (d, J=4 Hz, 1H: NH in 4); 6.72(unres. comp., 1H: NH in 2); 7.07 (d, J=8 Hz, 2H: aromatic Hs in 4 ε);7.15 (d, J=8 Hz, 2H: aromatic Hs in 4 δ); from 7.15 to 7.35 (mt, 5H:aromatic Hs in 6); 7.40 (dd, J=8 and 1 Hz, 1H: 1′H₄); 7.45 (dd, J=8 and4 Hz, 1H: 1′H₅); 7.92 (dd, J=4 and 1 Hz, 1H: 1′H₆); 8.40 (unres. comp.,1H: NH in 6); 8.50 (d, J=10 Hz, 1H: NH in 1); 11.72 (s, 1H: OH).

EXAMPLE 33 Preparation of Derivatives of Phenylalanine and ofPhenylpyruvic Acid Which Have Already Been Described.

Phenylalanine, and its derivatives 4-methoxyphenylalanine,4-bromophenylalanine, 4-chlorophenylalanine, 4-iodophenylalanine,4-trifluoromethylphenylalanine, 4-aminophenylalanine and3-methoxyphenylalanine, which are employed in this work, arecommercially available.

The following derivatives of phenylalanine can be prepared in accordancewith methods described in the literature.

(RS)-4-dimethylaminophenylalanine

D. F. Elliott, A. T. Fuller, C. R. Harrington, J. Chem. Soc., 1948,85-89.

(RS)-4-diethylaminophenylalanine

Moldaver B. L., Pushkareva Z. V., Zhur. Obshchei Khim., 31, 1560-1569(1961); C. A. 1961, 22226f.; J. A. Stock, J. Chem. Soc, 1959, 90-97

(RS)-4-ethylaminophenylalanine

F. Bergel, J. A. Stock, J. Chem. Soc, 1959, 90-97.

(RS)-4-phenylphenylalanine

J. V. Braun, J. Nelles, Berichte, 66B, 1933, 1464-1470.

(RS)-4-methylphenylalanine

R. R., Herr, T. Enjoki, J. P. Dailey, J. Am. Chem. Soc, 1957, 79,4229-4231.

(RS)-4-methylthiophenylalanine and (R,S)-4-ethylthiophenylalanine

R. L. Colescott, R. R. Herr, J. P. Dailey J. Am. Chem. Soc, 1957, 79,4232-4235.

(RS)-4-methoxycarbonylphenylalanine

H. Cleland, J. Org. Chem., 1969, 34, 747.

(RS)-2,4-dimethylphenylalanine

R. R., Herr, T. Enjoki, J. P. Dailey, J. Am. Chem. Soc, 1957, 79,4229-4231.

(RS)-3,4-dimethylphenylalanine

R. R., Herr, T. Enjoki, J. P. Dailey, J. Am. Chem. Soc, 1957, 79,4229-4231.

(RS)-3-trifluoromethylphenylalanine hydrochloride

R. Filler and H. Novar. J. Org. Chem, 1960, 25, 733-736.

(S)-4-aminomethylphenylalanine

G. E. Stokker, W. F. Hoffman and C. F. Homnick, J. Org. Chem., 1993, 58,5015-5017.

(R,S)-3-methylphenylalanine

J. H. Burckhalter, V. C. Stephens, J. A. C. S. 1951, 73, 56-58.

(R,S)-4-acetylphenylalanine

J. I. Degaw et al., J. Med. Che., 1969, 11, 225-227

(S)-4-O-allyltyrosine

A. Loffet, E. Zang, Int. J. Pept. Protein. Res., 1993, 42, 346

(S)-4-O-ethyltyrosine

Y. Sasaki et al., Chem. Pharm, Bull., 1982, 30, 4435

(RS)-4-ethylphenylalanine

A. Zhuze et al., Coll., Czech. Chem. Commmm., 1965, 62, 2648

4-tert-butylphenylpyruvic acid can be prepared in accordance with R.Breslow, J. W. Canary, M. Varney, S. T. Waddell and D. Yang, J. Am.Chem. Soc., 1990, 112, 5212-5219.

The other derivatives of phenylalanine were prepared in accordance withExamples 34 to 42 which are given below. In these examples, flashchromatography was carried out under a mean nitrogen pressure of 50 kPausing a silica of granule size 40-53 μm, in accordance with Still etal., J. Org. Chem., 43, 2923, (1978).

EXAMPLE 34 Preparation of derivatives of phenylalanine and of aderivative of phenylpyruvic acid using method A

34-1 (RS)-4-methylaminophenylalanine, dihydrochloride

37 ml of 12 N hydrochloric acid are added to 3.70 g of methylN-acetyl-4-methylaminophenylalaninate, and the mixture is heated toreflux, while stirring, for 8 h. After one night at room temperature,the reaction medium is concentrated to dryness under reduced pressure(50 kPa), and the residue is taken up in a mixture of 50 ml of tolueneand 50 ml of ethanol, and this mixture is concentrated once again. Afterdrying in a desiccator under reduced pressure (2.6 kPa), 4.18 g (100%)of (RS)-4-methylaminophenylalanine dihydrochloride are obtained in theform of a hygroscopic light beige solid which melts at 158° C.

34-2: Methyl (RS)-N-acetyl-4-methylaminophenylalaninate

0.4 g of 10% palladium on charcoal, and then 50 ml of absolute ethanol,are added to 4 g of methyl 4-methylamino-2-acetamidocinnamate which isplaced under a nitrogen atmosphere in an autoclave. The mixture isplaced under a pressure of 5.5 bar of hydrogen and heated at 50° C. for15 h with stirring. After stabilizing the temperature at 26° C., andreturning the pressure to atmospheric, the medium is filtered throughClarcel®, washed with ethanol and then concentrated to dryness underreduced pressure (2.6 kPa). This results in 3.73 g of methylN-acetyl-4-methylaminophenylalaninate in the form of white crystalswhich melt at 118° C. 34-3: Methyl 4-methylamino-2-acetamidocinnamate

5.75 g of methyl 2-acetamidoacrylate, 0.185 g of palladium acetate, 8.1g of tetrabutylammonium chloride and 6.03 g of sodium hydrogen carbonateare added to a 3-necked flask which is placed under nitrogen, and then6.5 g of 4-iodo-N-methylalanine, in solution in 200 ml of DMF, are addedto this mixture. The mixture is heated at 82° C. for 16 h 30 min andthen, after having been cooled down, is poured into 1000 ml of distilledwater. The medium is extracted with 250 ml of CH₂Cl₂ and the organicphase is separated off; the aqueous phase is then washed twice with 250ml of CH₂Cl₂. The organic phases are combined, dried over sodiumsulphate, filtered and concentrated under reduced pressure (50 kPa) at70° C. to yield a brown oil which is purified by flash chromatography(eluent, AcOEt/cyclohexane and then pure AcOEt).

In this way, 4 g of methyl 4-methylamino-2-acetamidocinnamate isobtained in the form of a yellow solid (Merck Silica 5719, R_(f)=0.48),which is employed in this form.

N-Methyl-p-iodoanaline can be prepared in accordance with: S.Krishnamurthy, Tetrahedron Letters, 33, 3315-3318, 1982.

34-4: 4-methylaminophenylpyruvic acid 2.4 g of methyl4-methylamino-2-acetamidocinnamate and 32 ml of 12 N hydrochloric acidare placed in a round-bottomed flask. The mixture is heated to refluxfor 3 h and then cooled down and washed twice with 20 ml of diethylether. The aqueous phase is cooled down to −10° C. and the precipitatewhich is obtained is filtered and then rinsed with a minimum of coldhydrochloric acid. The solid which is obtained is dried in a desiccatorunder reduced pressure in order to yield 1.1 g of4-methylaminophenylpyruvic acid in the form of a light beige solid whichmelts at 210° C.

34-5: (R,S)-3-Fluoro-4-methylphenylalanine hydrochloride

0.6 g of (R,S)-3-fluoro-4-methylphenylalanine hydrochloride is obtainedin the form of white crystals which melt at a temperature greater than260° C. by proceeding as in Example 34-1 but using 1.6 g of methylN-acetyl(3-fluoro-4-methyl)phenylalaninate.

34-6: Methyl (R,S)-N-acetyl-(3-fluoro-4-methyl)phenylalaninate

1.6 g of methyl N-acetyl-(3-fluoro-4-methyl)phenylalaninate are obtainedin the form of a colourless oil (Merck Silica 5719, R_(f)=0.46; eluentCH₂Cl₂/AcOEt 50/50), by proceeding as in Example 34-2 but using 1.9 g ofmethyl (4-methyl-3-fluoro)-2-acetamidocinnamate and 0.2 g of 10%palladium on charcoal in 230 ml of ethanol.

34-7: Methyl (3-fluoro-4-methyl)-2-acetamidocinnamate

2.6 g of methyl (3-fluoro-4-methyl)-2-acetamidocinnamate are obtained inthe form of a white solid which melts at 163° C. by proceeding as inExample 34-3 but using 3.6 g of methyl 2-acetamidoacrylate, 0.12 g ofpalladium acetate, 5.2 g of tetrabutylammonium chloride, 3.8 g of sodiumhydrogen carbonate and 4 g of 2-fluoro-4-bromotoluene in solution in 120ml of anhydrous DMF.

34-8: (R,S)-4-Trifluoromethoxyphenylalanine hydrochloride or(R,S)-O-trifluoromethyltyrosine hydrochloride

1.5 g of (R,S)-4-trifluoromethoxyphenyl -alanine hydrochloride areobtained in the form of white crystals which melt at 260° C. byproceeding as in Example 34-1 but using 3 g of methylN-acetyl-(4-trifluoromethoxy)phenylalaninate and 30 ml of 12 Nhydrochloric acid.

34-9: Methyl (R,S)-N-acetyl-(4-trifluoromethoxy)phenylalaninate

3 g of methyl N-acetyl-(4-trifluoroethoxy) -phenylalaninate are obtainedin the form of a white solid which melts at 80° C. by proceeding as inExample 34-2 but using 3.1 g of methyl(4-trifluoromethoxy)-2-acetamidocinnamate and 0.3 g of 10% palladium oncharcoal in 50 ml of ethanol.

34-10: Methyl 4-trifluoromethoxy-2-acetamidocinnamate

3.1 g of methyl (4-trifluoromethoxy)-2-acetamidocinnamate are obtainedin the form of a white solid which melts at 135° C. by proceeding as inExample 34-3 but using 4.3 g of methyl 2-acetamido acrylate, 0.14 g ofpalladium acetate, 6.1 g of tetrabutyl -mmonium chloride, 4.6 g ofsodium hydrogen carbonate and 5 g of 4-trifluoromethoxybromobenzene insolution in 150 ml of anhydrous DMF.

34-11: (R,S)-3-Methylthiophenylalanine hydrochloride

1.38 g of (R,S)-3-methylthiophenylalanine hydrochloride are obtained inthe form of white crystals which melt at 190° C. by proceeding as inExample 34-1 but using 3.3 g of methylN-acetyl-3-methylthiophenylalaninate and 40 ml of 12 N hydrochloricacid.

34-12: Methyl (RS)-N-acetyl-3-methylthiophenylalaninate

3.72 g of methyl 3-methylthio-2-acetamidocinnamate, dissolved in 100 mlof methanol, and 30 ml of tetrahydrofuran are placed in a round-bottomedflask, and 1.4 g of magnesium are then added. After reacting for 20 min,the mixture is cooled in an ice bath and a further 1.4 g of magnesiumare then added. The mixture is stirred at room temperature for 18 h andthen poured into 1.4 l of distilled water and 300 ml of CH₂Cl₂; thismixture is then filtered through Clarcel®. The aqueous phase is adjustedto pH 6 by adding 12 N hydrochloric acid and then separated off andwashed with 100 ml of CH₂Cl₂. The organic phases are collected, driedover magnesium sulphate, filtered and then concentrated to dryness underreduced pressure in order to yield 3.42 g of methylN-acetyl-3-methylthiophenylalaninate in the form of a colourless oil(Merck Silica 5719, R_(f)=0.5; AcOEt). 34-13: Methyl3-methylthio-2-acetamidocinnamate

4.8 g of methyl (3-methylthio)-2-acetamidocinnamate are obtained in theform of a white solid which melts at 139° C. by proceeding as in Example34-3 but using 5.6 g of methyl 2-acetamidoacrylate, 0.18 g of palladiumacetate, 8.2 g of tetrabutylammonium chloride, 5.86 g of sodium hydrogencarbonate and 6.5 g of 3-iodo-1-methylthiobenzene dissolved in 160 ml ofanhydrous DMF.

34-14: 3-Iodomethylthiobenzene

20 ml of distilled water and 20 ml of 12 N hydrochloric acid are placed,with stirring, in a three-necked flask, and 10 ml of 3-methylthioanilineare then added using a dropping funnel. The mixture is warmed to ensuredissolution and is then cooled down to 5° C. 5.86 g of sodium nitritedissolved in 15 ml of water are subsequently added slowly, using adropping funnel, while maintaining the temperature between 5 and 8° C.20 min after having completed the addition, 13.57 g of potassium iodidedissolved in 15 ml of water are added over a period of 10 min and themixture is then stirred at room temperature for 15 h. The oil whichforms is separated from the aqueous phase by decantation, and an aqueoussolution of sodium thiosulphate is then added to it. The aqueous phaseis decanted and the product is extracted with 100 ml of dichloromethane.The organic phase is washed with 100 ml of water, and the aqueous phaseis adjusted to pH 9 with concentrated sodium hydroxide solution, andthen separated off. The organic phase is washed with 2 times 100 ml ofwater, separated off, dried over magnesium sulphate, filtered and thenconcentrated to dryness under reduced pressure (50 kPa) at 40° C. Theresulting product is purified by flash chromatography (eluent,cyclohexane) in order to yield 13 g of 3-iodo-1-methylthiobenzene in theform of a yellow liquid (Merck Silica 5719, R_(f)=0.8/cyclohexane).

EXAMPLE 35 Preparation of Derivatives of Phenylalanine Using Method B

35-1: (RS)-4-tert-butylphenylalanine

25 g of diethyl 4-(tert-butyl)benzyl acetamidomalonate and 250 ml of 37%hydrochloric acid are added to a three-necked flask which is surmountedby a condenser. The mixture is stirred and heated to reflux until thereis no further evolution of gas. After the reaction medium has beencooled down, the precipitate which is obtained is filtered and thenrecrystallized in acetonitrile to yield 25.6 g of(R,S)-4-tert-butylphenylalanine hydrochloride in the form of a whitesolid which melts at 234° C.

35-2: Diethyl 4-(tert-butyl)benzylacetamidomalonate

25 g of 4-(tert-butyl)benzyl bromide, 50 ml of anhydrous toluene and 3.1g of sodium hydride in 80% suspension in oil are added to a three-neckedflask which is surmounted by a condenser, followed by 21.8 g of diethylacetamidomalonate. The mixture is heated at 110° C. for 17 h. After ithas been cooled down, 15 ml of absolute ethanol, then 15 ml of 50%ethanol and then 50 ml of water are added slowly to it using a droppingfunnel. The organic phase is decanted and the aqueous phase is washedwith 3 times 50 ml of diethyl ether. The organic phases are combined,washed with water and then dried over sodium sulphate. Followingfiltration and concentration under reduced pressure, the product iscrystallized in petroleum ether in order to yield 25 g of diethyl4-(tert-butyl)benzylacetamidomalonate in the form of a white solid whichmelts at 80° C.

35-3: (R,S)-3-Methylaminophenylalanine dihydrochloride

1.03 g of a yellow-beige solid are obtained by proceeding as in Example35-1 but using 1.17 g of diethyl 3-methylaminobenzylacetamidomalonateand 20 ml of 12 N hydrochloric acid. This yellow-beige solid isdissolved in 20 ml of absolute ethanol, and 0.4 g of animal charcoal isadded to this solution. The solution is filtered through Clarcel andthen filtered and concentrated under reduced pressure (50 kPa). The sameprocedure is repeated starting with 1 g of animal charcoal, and thesolid which is obtained is triturated in 20 ml of ether. Followingfiltration and drying under reduced pressure (2.7 kPa) at 50° C., 0.65 gof (R,S)-3-methylaminophenylalanine dihydrochloride is obtained in theform of a white powder which melts at a temperature approaching 135° C.(decomposition).

35-4: Diethyl 3-methylaminobenzylacetamido-malonate

3.11 ml of acetic anhydride are placed in a three-necked flask which ismaintained under a nitrogen atmosphere. 1.51 ml of formic acid aresubsequently added within 3 min at 0° C., and the mixture is then heatedat 50° C. for 2 hours. The mixture is allowed to return to roomtemperature, while shaking for 3 h 20 min, and 4 ml of anhydrous THF areadded under nitrogen; the mixture is then cooled to −20° C. A solutionof 4 g of diethyl 3-aminobenzylacetamidomalonate in a mixture of 15 mlof anhydrous THF and 15 ml of anhydrous dichloromethane is added within10 min. Stirring is continued for 1 h 10 min at −20° C. and then for 16h at 20° C. The reaction mixture is concentrated to dryness underreduced pressure (50 kPa) at 30° C. and then co-evaporated with 30 ml ofanhydrous toluene in order to yield a white solid, which is dissolved ina mixture of 10 ml of anhydrous THF and 20 ml of anhydrous1,2-dichloroethane, which solution is then placed in a three-neckedflask under nitrogen.

The medium is cooled down to −5° C., and 1.55 ml of borane-dimethylsulphide complex (2M solution in THF) are then added within 10 min. Themixture is allowed to return to room temperature, and the solution isheated to reflux for 3 h and then stirred at room temperature for 15 h.The reaction medium is cooled to 0° C., and 10 ml of MeOH are then addedwithin 25 min. The mixture is stirred for 45 min at 0° C. and then for30 min at room temperature. It is then cooled to 0° C. and HCl gas isbubbled in until a pH of 2 is reached. The mixture is heated at refluxfor 1 h and is then concentrated to dryness under reduced pressure at30° C. in order to yield 5 g of a product which is taken up in 30 ml ofan aqueous solution of NaHCO₃ and 30 ml of CH₂Cl₂. The organic phase isdecanted and the aqueous phase is washed with 20 ml of water. Theorganic phases are pooled, dried over magnesium sulphate, filtered andthen concentrated to dryness under reduced pressure (2.6 kPa) in orderto yield 3.43 g of a yellow oil, which is purified by flashchromatography (eluent, AcOEt/cyclohexane 50/50). After drying underreduced pressure (2.7 kPa) at 20° C., 1.18 g of diethyl3-methylaminobenzylacetamidomalonate are thus obtained in the form of alight beige solid which melts at 122° C.

35-5: Diethyl 3-aminobenzylacetamidomalonate

Diethyl 3-aminobenzylacetamidomalonate can be prepared as described in:

T. S. Osdene, D. N. Ward, W. H. Chapman and H. Rakoff, J. Am. Chem.Soc., 81, 1959, 3100-3102.

35-6: (R,S)-3-Ethylaminophenylalanine dihydrochloride

1.7 g of (R,S)-3-ethylaminophenylalanine dihydrochloride are obtained inthe form of a hygroscopic light beige solid, which contains 10 molar %of (R,S)-3-diethylaminophenylalanine dihydrochloride, by proceeding asin Example 34-1 but using 2 g of ethyl (R,S)-N-acetyl-3-ethylaminophenyl-alaninate and 30 ml of 12N hydrochloric acid.

35-7: (R,S)-N-acetyl-3-ethylaminophenyl -alaninate

3 g of ethyl (R,S)-N-acetyl-3-aminophenyl -alaninate, 40 ml of ethanoland 14 g of Raney nickel, which has previously been washed withdistilled water and ethanol, are placed in a round-bottomed flask undera nitrogen atmosphere. The mixture is heated to reflux for 19 h, cooleddown, filtered through Clarcel®, and then concentrated to dryness underreduced pressure (50 kPa) in order to yield 3.07 g of a colourless oil,which is purified by flash chromatography (eluent, AcOet) in order toyield 2.1 g of ethyl (R,S)-N-acetyl-3-ethylaminophenylalaninate in theform of a colourless oil (Merck Silica 5719, R_(f)=0.6: AcOEt) whichcontains 10% ethyl (R,S)-N-acetyl-3-diethylaminophenylalaninate.

35-8: Ethyl (R,S)-N-acetyl-3-aminophenylalaninate

25 g of a mixture of ethyl (R,S)-N-acetyl-3-nitrophenylalaninate (75 mol%/mol) and diethyl 3-nitrobenzylacetamidomalonate (25 mol %/mol) areplaced under nitrogen in an autoclave. 2.5 g of 10% palladium oncharcoal and then 200 ml of dichloromethane are added. The mixture isplaced under a hydrogen pressure of 9 bar and then stirred at 18° C. for4 h. After returning the pressure to atmospheric, the reaction medium isfiltered through Clarcel®, washed with dichloromethane and thenconcentrated to dryness under reduced pressure (50 kPa) in order toyield a solid, which is recrystallized in 450 ml of distilled waterunder reflux and in the presence of 4 g of 3S animal charcoal. Followinghot filtration through Clarcel®, the mixture is left to crystallize at4° C., with the crystals being filtered and then dried in order to yield9.9 g of ethyl (R,S)-N-acetyl-3-aminophenylalaninate in the form of alight beige solid which melts at 106° C. and which contains 5% ofdiethyl 3-aminobenzylacetamidomalonate.

35-9: Ethyl (R,S)-N-acetyl-3-nitrophenyl -alaninate and diethyl3-nitrobenzylacetamidomalonate

600 ml of absolute ethanol and then 7.9 g of sodium are placed, under anitrogen atmosphere, in a three-necked flask which is surmounted by acondenser. Once dissolution is complete, 74.5 g of diethylacetamidomalonate and then 60 g of 4-nitrobenzyl chloride in 200 ml ofanhydrous ethanol are added. The mixture is heated to reflux for 16 h 30min. After cooling, the reaction medium is concentrated under reducedpressure (50 kPa) and then taken up in a mixture of 500 ml of CH₂Cl₂ and500 ml of water. The pH is adjusted to 7 by adding 0.5N sulphuric acid,and the organic phase is then separated off and the aqueous phase iswashed with 2 times 200 ml of CH₂Cl₂. The organic phases are pooled,washed with 200 ml of water saturated with sodium bicarbonate, separatedoff and then dried over magnesium sulphate. Following filtration andconcentration under reduced pressure (50 kPa), the product isrecrystallized in 600 ml of ethanol at reflux in order to yield, aftercrystallizing at ambient temperature, filtering and drying, 70.4 g ofdiethyl 3-nitrobenzylacetamido -malonate in the form of white crystalswhich melt at 156° C. The mother liquors are concentrated and thenpurified by flash chromatography (eluent, AcOEt) in order to yield 25.6g of a mixture of ethyl N-acetyl-3-nitrophenylalaninate (75 mol %/mol)and diethyl 3-nitrobenzylacetamidomalonate (25 mol %/mol) in the form ofa light beige solid, which is used in this form in the following step.

35-10: (RS,)-3-Dimethylaminophenylalanine dihydrochloride

A solid is obtained, after evaporation, by proceeding as in Example 35-1but using 0.72 g of ethyl (RS)-N-acetyl-3-dimethylaminophenylalaninateand 8.6 ml of 10N hydrochloric acid; the solid is subsequentlytriturated in 50 ml of acetone, filtered and then dried under reducedpressure (2.7 kPa) at 40° C. 0.68 g (93%) of(RS)-3-dimethylaminophenylalanine dihydrochloride is obtained in theform of a white solid which melts in the region of 120° C.(decomposition).

35-11: Ethyl (RS)-N-acetyl-3-dimethylaminophenylalaninate

4 g of ethyl (RS)-N-acetyl-3-aminophenylalaninate, prepared as describedin Example 35-8, in 15 ml of DMF are placed in a three-necked flaskunder a nitrogen atmosphere, and 5.5 ml of triethylamine, and then 2.5ml of methyl iodide and 4 ml of dichloromethane, are added whilemaintaining the temperature in the region of 30° C. using an icebath.The mixture is then warmed at 35° C. for 18 h. 1 ml of methyl iodidedissolved in 1 ml of DMF is then added slowly while maintaining thetemperature in the region of 30° C.; 2.2 ml of triethylamine are thenadded and the mixture is subsequently warmed for a further 5 h at 35° C.The mixture is brought to room temperature and then extracted with 100ml of ethyl acetate and 150 ml of distilled water. The aqueous phase isseparated off after settling and then rewashed with 2 times 70 ml ofethyl acetate. The organic phases are combined, washed with 2 times 80ml of distilled water and then with 50 ml of distilled water which issaturated with NaCl. The organic phase is separated off after settling,dried over magnesium sulphate, filtered and then concentrated to drynessunder reduced pressure in order to yield 2.4 g of a product which ispurified by flash chromatography (dichloromethane, MeOH 90/10). 0.72 g(16%) of ethyl (RS)-3-N-acetyl-3-dimethylamino phenylalaninate is thusobtained in the form of yellow crystals.

EXAMPLE 36 Preparation of Derivatives of Phenylalanine Using Method C

36-1: (R,S)-4-Isopropylphenylalanine

7 g of red phosphorus and 8 g of4-(isopropylbenzylidene)-2-methyl-5-oxazolone, in 47 ml of aceticanhydride, are placed in a three-necked flask, and then 35 ml of 57%hydriodic acid are added slowly, with stirring, using a dropping funnel.Once the addition is complete, the mixture is heated to reflux for 3 h30 min and then left at room temperature for 3 days. The reactionmixture is filtered and the solid which is obtained is rinsed twice with10 ml of acetic acid on each occasion, and the filtrate is thenconcentrated to dryness under reduced pressure. The residue which isobtained is taken up in 100 ml of distilled water, and this solution isconcentrated to dryness under reduced pressure in order to yield a solidwhich is taken up in 50 ml of distilled water; this solution is thenextracted with 3 times 50 ml of diethyl ether after 0.5 g of sodiumsulphite have been added. The ether is separated off and the aqueousphase is placed under reduced pressure in order to eliminate traces ofdiethyl ether. 2 g of animal charcoal are added to the aqueous phase,which is heated at 40-50° C., and then filtered through Clarcel®;rinsing then takes place with a minimum of water. The pH is adjusted to5 by adding 32% ammonia at 4° C. The precipitate which is obtained isfiltered in the cold, rinsed with 2 times 10 ml of water, with 10 ml ofethanol and then with 2 times 10 ml of ether in order to yield, afterdrying under reduced pressure at 20° C., 3.97 g of(R,S)-4-isopropylphenylalanine in the form of a white solid which meltsat a temperature greater than 260° C. (See also Journal of the TakedaResearch Laboratories, vol. 43; nos. 3/4, December 1984, pp 53-76).

36-2: 4-(Isopropylbenzylidene)-2-methyl-5-oxazolone

18.52 g of N-acetylglycine, 10.6 g of sodium acetate, 20 ml of4-isopropylbenzaldehyde and 57 ml of acetic anhydride are placed in around-bottomed flask which is provided with a condenser. The mixture isstirred for 30 min and then stirred for 1 h at 110° C. and subsequentlyfor 15 h at room temperature. The reaction medium is poured into 600 mlof water and 400 ml of petroleum ether which has previously been heatedto 50° C. The organic phase is separated off and the aqueous phase iswashed with 2 times 150 ml of petroleum ether.

The organic phases are combined, dried over magnesium sulphate, filteredand concentrated under reduced pressure until the volume is 100 ml and aprecipitate is obtained. The latter is filtered and washed with 2 times50 ml of pentane in order to yield 8.2 g of4-(isopropylbenzylidene)-2-methyl-5-oxazolone in the form of a yellowsolid which melts at 77° C.

36-3: (R,S)-4-Butylphenylalanine

0.35 g of (R,S)-4-butylphenylalanine is obtained in the form of a lightbeige solid which melts at a temperature greater than 260° by proceedingas in Example 36-1 but using 1.49 g of red phosphorus, 1.8 g of4-(butylbenzylidene)-2-methyl-5-oxazolone, in 9.23 ml of aceticanhydride, and 7.39 ml of 57% hydriodic acid.

36-4: 4-(Butylbenzylidene)-2-methyl-5-oxazolone

1.89 g of 4-(butylbenzylidene)-2-methyl-5-oxazolone are obtained in theform of a yellow solid which melts at 74° C. by proceeding as in Example36-2 but using 8.43 g of N-acetylglycine, 4.92 g of sodium acetate, 9.8g of 4-butylbenzaldehyde and 26 ml of acetic anhydride.

EXAMPLE 37 Preparation of a Derivative of Phenylalanine Using Method D

37-1: (R,S)-3-Ethoxyphenylalanine hydrochloride (or(R,S)-3-O-ethyltyrosine hydrochloride)

1 g of (R,S)-N-tert-butoxycarbonyl-3-ethoxyphenylalanine, dissolved in3.6 ml of hydrochloric dioxane, is placed in a round-bottomed flask, andthe mixture is then stirred at room temperature for 5 h. The precipitatewhich forms is filtered, rinsed with dioxane and then ether, and thendried under reduced pressure (2.7 kPa) at 40° C. to yield 0.65 g of(R,S)-3-ethoxyphenylalanine hydrochloride in the form of a white solidwhich melts at 200° C.

37-2: (R,S)-N-tert-Butoxycarbonyl-3-ethoxyphenylalanine

1.33 g of ethyl (R,S)-N-tert-butoxycarbonyl-3-ethoxyphenylalaninate,dissolved in 8 ml of methanol, are placed in a round-bottomed flask, and8 ml of 1N sodium hydroxide solution are then added. After the mixturehas been stirred at room temperature for 18 h, it is evaporated underreduced pressure and then acidified with 8.56 ml of 1N hydrochloricacid. The product is extracted with 2 times 10 ml of ethyl acetate, andthe organic phases are pooled, washed with 2 times 10 ml of water,dried, filtered and then concentrated to dryness under reduced pressureto yield 1 g of (R,S)-N-tert-butoxycarbonyl-3-ethoxyphenylalanine in theform of a yellow oil (Merck Silica 5719, R_(f)=0.7, eluent: toluene80/MeOH 10/diethylamine 10).

37-3: (R,S)-N-tert-Butoxycarbonyl-3-ethoxyphenylalaninate

1.5 g of (R,S)-N-tert-butoxycarbonyl-3-tyrosine, dissolved in 7.5 ml ofdry DMF, are placed in a three-necked flask under a nitrogen atmosphere,and 0.508 g of sodium hydride, as a 50% dispersion in oil, is thenadded. After the mixture has been stirred at room temperature for 2 h,0.86 ml of iodoethane is added and the mixture is then stirred at roomtemperature for 4 h. The medium is filtered and the resulting solid iswashed with 3 times 10 ml of water and then 2 times 10 ml of petroleumether to yield, after drying under reduced pressure (2.7 kPa) at 30° C.,1.33 g of ethyl (R,S)-N-tert-butoxycarbonyl-3-ethoxyphenylalaninate inthe form of a white solid.

37-4: (R,S)-N-tert-Butoxycarbonyl-3-tyrosine

18 g of (R,S)-3-tyrosine, dissolved in 180 ml of dioxane, are placed,with stirring, in a three-necked flask, and 99 ml of IN sodium hydroxidesolution, followed by 26 g of di-tert-butyl dicarbonate, dissolved in160 ml of dioxane, are then added. After the mixture has been stirredfor 36 h, it is concentrated under reduced pressure at 30° C. and theresidue is taken up in 100 ml of distilled water; this solution isacidified to pH 5 with iN hydrochloric acid and then extracted with 2times 200 ml of ethyl acetate. The organic phase is dried over magnesiumsulphate, filtered and then concentrated to dryness under reducedpressure at 30° C. to yield 30 g of(R,S)-N-tert-butoxycarbonyl-3-tyrosine in the form of a white solid(Merck Silica 5719, R_(f)=0.25, eluent: toluene 80, MeOH 10,diethylamine 10).

EXAMPLE 38 Preparation of Derivatives of Phenylalanine Using Method E

38-1: (RS)-4-Diallylaminophenylalanine dihydrochloride

A solid is obtained, after evaporation, by proceeding as in Example 35-1but using 5.8 g of diethyl 4-diallylaminobenzylacetamido malonate and 48ml of 10N hydrochloric acid; the solid is then triturated in 50 ml ofacetone, filtered, then triturated in 10 ml of dichloromethane, filteredana then rinsed with 3 times 10 ml of ethyl ether. After drying underreduced pressure (2.7 kPa) at 40° C., 4.41 g of(RS)-4-diallylaminophenylalanine dihydrochloride are obtained in theform of an off-white solid which melts in the region of 135° C.(decomposition).

38-2: (RS)-4-Allylaminophenylalanine dihydrochloride

A solid is obtained, after evaporation, by proceeding as in Example 35-1but using 3.27 g of diethyl 4-allylaminobenzylacetamidomalonate and 30ml of 10N hydrochloric acid; the solid is then triturated in 50 ml ofacetone, filtered and then dried under reduced pressure (2.7 kPa) at 40°C. 2.3 g of (RS)-4-allylaminophenylalanine dihydrochloride are obtainedin the form of a white solid which melts in the region of 134° C.(decomposition).

38-3: Diethyl 4-diallylaminobenzylacetamidomalonate and diethyl4-allylaminobenzylacetamidomalonate

10 g of diethyl 4-aminobenzylacetamidomalonate dissolved in 150 ml ofDMF are placed in a three-necked flask which is surmounted with adropping funnel and maintained under a nitrogen atmosphere. 6.57 ml ofallyl bromide, and then 10.76 ml of triethylamine, are added slowly, atroom temperature and while stirring. After stirring for 19 h, a further1.31 ml of allylbromide and 2.15 ml of triethylamine are then added andthe mixture is stirred for 26 h. The reaction medium is poured onto 1.5l of distilled water and this mixture is extracted with 1 l of ethylacetate. The aqueous phase is separated off after settling and washedwith 2 times 500 ml of ethyl acetate. The organic phases are combined,washed with 500 ml of distilled water and then with 500 ml of waterwhich is saturated with sodium chloride, separated off, dried overmagnesium sulphate, filtered and then concentrated to dryness in orderto yield a chestnut oil; this oil is purified by flash chromatography(eluant, CH₂Cl₂90/AcOEt 10) in order to yield 6.66 g of diethyl4-diallylaminobenzylacetamidomalonate in the form of a beige solid whichmelts at 94-96° C. (Rf=0.6, AcOEt 50/cyclohexane 50) and 3.49 g ofdiethyl 4-allylaminobenzylacetamidomalonate in the form of a beige solidwhich melts at 104-106° C. (Rf0.45 AcOEt 50/cyclohexane 50).

The diethyl 4-aminobenzylacetamidomalonate can be prepared as describedin J. B. Burckhalter, V C Stephens, J. Am. Chem. Soc. 56, 1951, 73.

EXAMPLE 39 Preparation of Derivatives of Phenylalanine Using Method F

39-1: (RS)-4-ethylisopropylphenylalanine dihydrochloride

A solid is obtained, after evaporation, by proceeding as in Example 35-1but using 2.9 g of diethyl 4-ethylisopropylbenzylacetamidomalonate and24.6 ml of 10N hydrochloric acid; the solid is then triturated in 20 mlof acetone, filtered and then dried under reduced pressure (2.7 kPa) at40° C. 2 g of (RS)-4-ethylisopropylaminophenylalanine dihydrochlorideare obtained in the form of a white solid which melts in the region of147° C. (decomposition).

39-2: Diethyl 4-ethylisopropylaminobenzylacetamidomalonate

15 g of diethyl 4-ethylaminobenzylacetamidomalonate in 70 ml of THF areplaced in a three-necked flask which is maintained under a nitrogenatmosphere; 6.4 ml of 2-iodopropane, and then 8.4 ml of1,5-diazabicyclo[4.3.0]non-5-ene are added and the mixture is thenheated at 60° C. for 24 h. 2.13 ml of 2-iodopropane, and then 8.4 ml of1,5-diazabicyclo[4.3.0]non-5-ene, are subsequently added and the mixtureis then heated for a further 24 h at 60° C. The mixture is brought toroom temperature and then extracted with 50 ml of dichloromethane and 50ml of distilled water. The aqueous phase is separated off after settlingand then rewashed with 2 times 30 ml of dichloromethane. The organicphases are combined, washed with 60 ml of distilled water and then with50 ml of distilled water which is saturated with NaCl. The organic phaseis separated off after settling, dried over magnesium sulphate, filteredand then concentrated to dryness under reduced pressure in order toyield 16.2 g of a product which is purified by flash chromatography(dichloromethane, MeOH 90/10). This results in 4.59 g of a product whichis recrystallized in 45 ml of cyclohexane in order to yield 3.44 g ofdiethyl ⁴-ethylisopropylaminobenzylacetamidomalonate in the form ofwhite crystals which melt at 80° C.

39-3: Diethyl 4-ethylaminobenzylacetamidomalonate

Diethyl 4-ethylaminobenzylacetamidomalonate can be prepared byproceeding as in Example 35-7 but using 22 g of diethyl4-aminobenzylacetamidomalonate, 500 ml of ethanol and 70 g of Raneynickel. This results in 23.8 g of diethyl4-ethylaminobenzylacetamidomalonate in the form of an off-white solidwhich melts at 136° C.

39-4: (RS)-4-Allylethylaminophenylalanine dihydrochloride

A solid is obtained, after evaporation, by proceeding as in Example 35-1but using 4.54 g of diethyl 4-allylethylbenzylacetamidomalonate and 37.9ml of 10N hydrochloric acid; the solid is then dried under reducedpressure (2.7 kPa) at 40° C. 3.67 g of(RS)-4-allylethylaminophenylalanine dihydrochloride are obtained in theform of a brown solid which melts in the region of 130° C.(decomposition).

39-5: Diethyl 4-allylethylaminobenzylacetamidomalonate

5.6 g of a solid are obtained, after purification by flashchromatography (eluant, CH2Cl2/AcOET 90-10 by volume), by proceeding asin Example 39-2 but using 8 g of diethyl4-ethylaminobenzylacetamidomalonate, 4 ml of allyl bromide and 5.82 mlof 1,5-diazabicyclo[4.3.0]non-5-ene in 50 ml of THF; the solid is thenrecrystallized in 35 ml of cyclohexane. This results in 5.43 g ofdiethyl 4-allylethylaminobenzylacetamidomalonate in the form of a whitesolid which melts at 86° C.

39-6: (RS)-4-Ethylisopropylaminophenylalanine dihydrochloride

A solid is obtained, after evaporation, by proceeding as in Example 35-1but using 2.5 g of diethyl 4-ethylpropylaminobenzylacetamidomalonate and21 ml of 10N hydrochloric acid;. The solid is then dried under reducedpressure (2.7 kPa) at 40° C. 2 g (97%) of(RS)-4-ethylpropylaminophenylalanine dihydrochloride are obtained in theform of a white solid which melts in the region of 147° C.(decomposition).

39-7: Diethyl 4-ethylpropylaminobenzylacetamidomalonate

2.8 g of a solid are obtained, after reacting for 36 hours and thenpurifying by flash chromatography (eluant, CH₂Cl2/MeOH 97-3 by volume),by proceeding as in Example 39-2 but using 10 g of diethyl4-ethylaminobenzylacetamidomalonate, 5.6 ml of 1-iodopropane and 7.2 mlof 1,5-diazabicyclo[4.3.0]non-5-ene in 70 ml of THF; the solid is thenrecrystallized in 26 ml of cyclohexane. This results in 2.9 g of diethyl4-ethylpropylaminobenzylacetamidomalonate in the form of a white solidwhich melts at 84-86° C.

39-8: (RS)-4-Ethylmethylcyclopropylaminophenylalanine dihydrochloride

A solid is obtained, after reacting for 3 days and then evaporating, byproceeding as in Example 35-1 but using 3 g of diethyl4-ethylmethylcyclopropylaminobenzylacetamidomalonate and 25 ml of 10Nhydrochloric acid; the solid is then triturated in 40 ml of acetone,filtered and then dried under reduced pressure (2.7 kPa) at 40° C. 2.24g of (RS)-4-ethylmethylcyclopropylaminophenylalanine dihydrochloride areobtained in the form of a white solid which melts in the region of 140°C. (decomposition).

39-9: Diethyl 4-ethylmethylcyclopropylaminobenzylacetamidomalonate

By proceeding as in Example 39-2, but using 8 g of diethyl4-ethylaminobenzylacetamidomalonate, 2.6 ml of bromomethylcyclopropaneand 2.97 ml of 1,5-diazabicyclo[4.3.0]non-5-ene in 50 ml of THF, 3.3 gof diethyl 4-ethylmethylcyclopropylaminobenzylacetamidomalonate areobtained, after reacting for 3 days and then purifying by flashchromatography (eluant CH2Cl2/ AcOEt 90-10 by volume), in the form of awhite solid which melts at 112-114° C.

EXAMPLE 40 Preparation of Derivatives of Phenylalanine Using Method G

40-1: (RS)-4-(1-Pyrrolidinyl)phenylalanine dihydrochloride

A solid is obtained, after evaporation, by proceeding as in Example 35-1but using 1.5 g of diethyl 4-(1-pyrrolidinyl)benzylacetamidomalonate and40 ml of 5N hydrochloric acid; the solid is then triturated in 15 ml ofacetone, filtered and then dried under reduced pressure (2.7 kPa) at 40°C. 0.6 g of (RS)-4-(1-pyrrolidinyl)phenylalanine dihydrochloride isobtained in the form of an off-white solid.

40-2: Diethyl 4-(1-pyrrolidinyl)benzylacetamidomalonate

4 g of d ethyl 4-(1-pyrrolyl)benzylacetamidomalonate, dissolved in 100ml of MeOH, and 1 g of 10% palladium on charcoal are placed in anautoclave. After having purged the autoclave 3 times with nitrogen, theproduct is hydrogenated at 19° C. under a pressure of 14 bars ofhydrogen. After stirring for 25 hours, the hydrogenation is stopped andthe product is filtered through Clarcel® and rinsed withdichloromethane; the solution is then concentrated under reducedpressure in order to yield 3.85 g of a solid which is triturated in amixture of 50 ml of heptane and 10 ml of ethyl ether. The resultingsolid is filtered, dried and then purified by flash chromatography(eluant CH₂Cl₂/acetone 90/10 by volume) in order to yield 1.6 g ofdiethyl 4-(1-pyrrolidinyl)benzylacetamidomalonate in the form of a whitesolid which melts at 132° C.

40-3: Diethyl 4-(1-pyrrolyl)benzylacetamidomalonate

4,6 g of diethyl 4-aminobenzylacetamidomalonate in 104 ml of acetic acidare placed in a three-necked flask which is maintained under nitrogen.7.02 g of sodium acetate are added, followed by 1.87 ml of2,5-dimethoxytetrahydrofuran. The mixture is heated at 65° C. for 1 h 15min, then cooled down and extracted with 100 ml of dichloromethane and100 ml of distilled water. The aqueous phase is separated off aftersettling and then washed with 3 times 100 ml of dichloromethane. Theorganic phases are combined, washed with 100 ml of water and then with100 ml of a saturated solution of NaCl, separated off after settling andthen dried over magnesium sulphate; the phases are filtered and thenevaporated to dryness under reduced pressure (50 kPa) in order to yield6.2 g of a solid which is purified by flash chromatography (eluentCH₂Cl₂/acetone 75/25 by volume). This results in 3.57 g of diethyl4-(1-pyrrolyl)benzylacetamidomalonate in the form of a beige solid whichmelts at 110° C.

EXAMPLE 41 Preparation of Derivatives of Phenylalanine Using Method H

41-1: (RS)-4-Ethylthiomethylphenylalanine

300 ml of anhydrous methanol are placed in a three-necked flask which ismaintained under nitrogen; subsequently, 1.72 g of sodium methoxide, andthen 5.55 ml of ethyl mercaptan, are added while stirring. The solventis concentrated under reduced pressure at 40° C. in order to yield 8.5 gof the sodium salt of ethyl mercaptan, which is dissolved in 100 ml ofanhydrous THF. 3.6 g of (RS)-4-chloromethylphenylalanine are added atroom temperature and the mixture is then heated to reflux for 18 h. Thesolvent is evaporated under reduced pressure at 40° C. and the residueis taken up in 100 ml of distilled water. The turbid solution which isobtained is acidified with 5 ml of acetic acid. The resultingprecipitate is filtered, rinsed with distilled water and then dried at60)C. under reduced pressure in order to yield 3.6 g of a solid which ispurified by flash chromatography (eluant AcOEt 60, AcOH 12, water 10).This results in 256 mg of (RS)-4-ethylthiomethylphenylalanine in theform of a white solid which melts at 251° C.

The (RS)-4-chloromethylphenylalanine can be obtained by analogy with(S)-4-chloromethylphenylalanine as described in: R. Gonzalez-Muniz, F.Cornille, F. Bergeron, D. Ficheux, J. Pothier, C. Durieux and B. Roques,Int. J. Pept. Protein. Res., 1991, 37 (41), 331-340.

EXAMPLE 42 Preparation of Derivatives of Phenylalanine Using Method I

42-1: (S)-4-O-(2-Chloroethyl)tyrosine hydrochloride

5 g of (S)-N-tert-butoxycarbonyl-4-O-(2-chloroethyl)tyrosine, dissolvedin 50 ml of hydrochloric dioxane, are placed in a round-bottomed flask.After having been stirred for 28 h, the mixture is concentrated todryness under reduced pressure. The resulting residue is taken up in 50ml of ether and this solution is then stirred and filtered. Theresulting solid is washed with 2 times 25 ml of ether and then driedunder reduced pressure in order to yield 1.58 g of(S)-4-O-(2-chloroethyl)tyrosine hydrochloride in the form of a whitesolid which melts at 260° C.

42-2: (S)-N-tert-Butoxycarbonyl-4-O-(2-chloroethyl)tyrosine

14 g of (S)-N-tert-butoxycarbonyltyrosine, dissolved in 140 ml of DMF,are placed in a three-necked flask under a nitrogen atmosphere. 4.8 g of50% sodium hydride in oil are added slowly using a spatula. 16.87 g of1-tosyl-2-chloroethanol are added after the mixture has been stirred for2 h at room temperature. 2.4 g of 50% sodium hydride in oil, and afurther 8.4 ml of 1-tosyl-2-chloroethanol, are added after the mixturehas been stirred for 2 days. The same procedure is carried out after 24h and the stirring is continued for a further 24 h. The reaction isstopped by adding 100 ml of distilled water, and the reaction mixture isconcentrated to dryness under reduced pressure. The residue which isobtained is taken up in 100 ml of distilled water and then extractedwith 3 times 100 ml of ethyl acetate. The aqueous phase is separated offafter settling and acidified to pH3 with 50 ml of 1N HCl, and theproduct is extracted with 3 times 100 ml of ethyl acetate. The organicphases are combined, washed with 2 times 50 ml of water, separated off,dried over magnesium sulphate, filtered and then concentrated to drynessunder reduced pressure in order to yield 13.51 g of(S)-N-tert-butoxycarbonyl-4-O-(2-chloroethyl)tyrosine in the form of achestnut oil (Rf=0.5, toluene 70%/methanol 20%/diethylamine 10%), whichis used as such in the following step.

TABLE V MICROORGANISMS ANTIBIOTICS FUNGI Micromonospora sp. VernamycinsSTREPTOMYCES S. alborectus Virginiamycins S. conganensis (ATCC13528)F1370 A, B S. diastaticus Plauracins, Streptogramins S. graminofasciensStreptogramins S. griseus (NRRL2426) Viridogrisein (Etamycin) S.griseoviridus Griseoviridin S. griseoviridus (FERMP3562)Neoviridogriseins S. lavendulae Etamycins S. loidensis (ATCC11415)Vernamycins S. mitakaensis (ATCC15297) Mikamycins S. olivaceus(ATCC12019) Synergistins (PA 114 A, B) S. ostreogriseus (ATCC27455)Ostreogrycins S. pristinaespiralis (ATCC25486) Pristinamycins S.virginiae (ATCC13161) Virginiamycins (Staphylomycins) ACTINOMYCETES A.auranticolor (ATCC31011) Plauracins A. azureus (ATCC31157) Plauracins A.daghestanicus Etamycin A. philippinensis A-2315 A,B,C Actinoplanes sp.(ATCC3302) A15104 Actinoplanes sp. A17002 A,B,C,F Actinomadura flavaMadumycins

Abbreviations employed: AcOEt ethyl acetate DNA deoxyribonucleic acidAMP adenosine 5′-monophosphate HPLC high-performance liquidchromatography dCTP deoxycytosine 5′-triphosphate DMF dimethylformamideDMPAPA 4-dimethylamino-L-phenylalanine HCl hydrochloric acid HT7 HickeyTresner solid medium 3-HPA 3-hydroxypicolinic acid IPTGisopropyl-β-D-thiogalactopyranoside kb kilobase LB Luria broth (richgrowth medium for E. coli) MeOH methanol MMPAPA4-methylamino-L-phenylalanine NaOH sodium hydroxide PAPA4-amino-L-phenylalanine PEG polyethylene glycol P I pristinamycin I P IIpristinamycin II bp base pair SAM S-adenosylmethionine TE 10 mM Tris-HClbuffer, 1 mM EDTA, pH 7.5 THF tetrahydrofuran Tris2-amino-2-(hydroxymethyl)-1,3- propanediol UV ultraviolet rays X-gal5-bromo-4-chloro-3-indoyl-β-D- galactoside YEME yeast extract-maltextract medium (rich growth medium for Streptomyces)

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17 1 2888 DNA Streptomyces pristinaespiralis 1 ctgcagttcc ccggggccaccgtgctcagc tcctcacccg aacggttcct gcgcatcggc 60 gcggacggct gggcggagtccaaacccatc aagggcaccc gcccccgcgg cgccggcccc 120 gcccaggacg ccgccgtcaaggcctccctc gccgcggccg agaaggaccg cagcgagaac 180 ctgatgatcg tcgacctggtccgcaacgac ctcggccagg tctgcgacat cggctccgtc 240 cacgtaccgg gcctgttcgaggtggagacc tacgccaccg tccaccagct cgtcagcacg 300 gtccgcggcc gcctggcggccgacgtctcc cgcccccgcg cggtacgggc cgccttcccc 360 ggcgggtcga tgaccggcgcgcccaaggtc cgcaccatgc agttcatcga ccggctcgag 420 aagggcccgc gcggcgtgtactcgggcgcg ctgggctact tcgccctcag cggcgcggcc 480 gacctcagca tcgtcatccgcaccatcgtc gccaccgagg aggccgccac catcggcgtg 540 ggcggcgccg tcgtcgccctgtccgacccc gacgacgagg tccgcgaaat gctcctcaag 600 gcgcagacca ccctcgccgccctgcgccag gcacacgcgg gcgccaccgc ctcggaccgt 660 gaactcctgg ccggcagcctgcggtgaccc acccaccgcc ccaccccggc caccgcaacc 720 ccggctcacc cccggggcggccgcgcgcgg tgccgcccgg cggccgaccc ggcgacgggt 780 ccgctcgcgg accgggtgacggacccggcg gcggggccgg cggcgggccg ggacgtgggc 840 cgggacgtgg gcccggcgtccccggcgacc ggcacggcgg cgggcccgga cgtgggcccg 900 gcgtgcccgg cgaccggcacggtggcgggg cggggcgggg gacggtcagt gcagggcggt 960 gaacatccgc gcgcacagccgttccagctc cgcgccgtgc tcgcccagca caccgcgcag 1020 ttcggcgaac agggcggcgaacgtctcctc gtcgcccctc tcgacggcct gccccagccg 1080 caccaggccg cggcccagcgcctgccgcgc ggccggcgcg ccggggttgg cggcctggat 1140 gtcgaaatac acctccggcgtcccgccggc gatccgggcc agcagcgcca gcatcgccag 1200 atgcggcggc ggggcactgtcccgcagcgc ccccacgtcc accgacagct cacccaggcc 1260 cagcccgaag gccagcaccgcggcatgcgt ggcggcctgc tgcgcggcgg tcagctcgtc 1320 gtgccgccgc gccggcatctccaccacccg ggccccccac ccggccacca gctccaccag 1380 ggcccgcaca ccgggcccgtcggtgaccac caccgccgcc accggccgcc cctgaagacc 1440 cagcgagggg gcgaacatcgggttcagccc caccgcctgc agccccggcg ccgcctcacg 1500 cagccgcccg gcgatccggctcttgaccga caaggtgtcc gcgagcaccg caccgggccg 1560 catcaccccc gccagcacctccaccgcctc ccacgccacc ggctccggca ccgccagcac 1620 caccacgtcc gccgccgccagcgccgcgac cgcctccggc cccggccgcc gcacatcacc 1680 ggccaccacc cgcaccccgtccgccgcacc ggccccggcc acgtccagcc aggtcaccgc 1740 cacccccgaa cgcaccagccagtggctgaa catgcggccc accgcaccgg ccccgcccac 1800 caccacacaa cgcccgaacaccgaaccacc cctcatccgc gttcccgatc cccccggtac 1860 ggaggaagaa ccatgaccccgcccgccatc cccgccgccc cgcccgccac cgggcccgcc 1920 cccgccaccg accccctcgacgcgctgcgc gcccgcctgg acgccgcgga cgccgccctg 1980 ctggacgccg tccgcacacgcctggacatc tgcctgcgca tcggcgagta caagcgcctc 2040 caccaggtgc cgatgatgcagccccaccgg atcgcccagg tccacgccaa cgccgcccgc 2100 tacgccgccg accacggcatcgaccccgcc ttcctgcgca ccctgtacga cacgatcatc 2160 accgagacct gccgcctcgaggacgagtgg atcgcctccg gcggcgcccc cgtccccacg 2220 cccgtgcacg cgtccgcgtccgcgcggggg gccgtgtcgt gaccgccgcc gcacccaccc 2280 tcgcccaggc gctggacgaggccaccgggc agctgaccgg cgccgggatc accgccgacg 2340 ccgcccgggc cgacacccggctgctggccg cccacgcctg ccaggtcgcc ccgggggacc 2400 tcgacacctg cctggccggcccggtgccgc cccggttctg gcactacgtc cggcgccgtc 2460 tgacccgcga acccgccgaacgcatcgtcg gccacgccta cttcatgggc caccgcttcg 2520 acctggcccc cggcgtcttcgtccccaaac ccgagaccga ggagatcacc cgggacgcca 2580 tcgcccgcct ggaggccctcgtccgccgcg gcaccaccgc acccctggtc gtcgacctgt 2640 gcgccggacc gggcaccatggccgtcaccc tggcccgcca cgtaccggcc gcccgcgtcc 2700 tgggcatcga actctcccaggccgccgccc gcgccgcccg gcgcaacgcc cgcggcaccg 2760 gcgcccgcat cgtgcagggcgacgcccgcg acgccttccc cgaactgagc ggcaccgtcg 2820 acctcgtcgt caccaacccgccctacatcc ccatcggact gcgcacctcc gcacccgaag 2880 tgctcgag 2888 2 888 DNAStreptomyces pristinaespiralis 2 atgaggggtg gttcggtgtt cgggcgttgtgtggtggtgg gcggggccgg tgcggtgggc 60 cgcatgttca gccactggct ggtgcgttcgggggtggcgg tgacctggct ggacgtggcc 120 ggggccggtg cggcggacgg ggtgcgggtggtggccggtg atgtgcggcg gccggggccg 180 gaggcggtcg cggcgctggc ggcggcggacgtggtggtgc tggcggtgcc ggagccggtg 240 gcgtgggagg cggtggaggt gctggcgggggtgatgcggc ccggtgcggt gctcgcggac 300 accttgtcgg tcaagagccg gatcgccgggcggctgcgtg aggcggcgcc ggggctgcag 360 gcggtggggc tgaacccgat gttcgccccctcgctgggtc ttcaggggcg gccggtggcg 420 gcggtggtgg tcaccgacgg gcccggtgtgcgggccctgg tggagctggt ggccgggtgg 480 ggggcccggg tggtggagat gccggcgcggcggcacgacg agctgaccgc cgcgcagcag 540 gccgccacgc atgccgcggt gctggccttcgggctgggcc tgggtgagct gtcggtggac 600 gtgggggcgc tgcgggacag tgccccgccgccgcatctgg cgatgctggc gctgctggcc 660 cggatcgccg gcgggacgcc ggaggtgtatttcgacatcc aggccgccaa ccccggcgcg 720 ccggccgcgc ggcaggcgct gggccgcggcctggtgcggc tggggcaggc cgtcgagagg 780 ggcgacgagg agacgttcgc cgccctgttcgccgaactgc gcggtgtgct gggcgagcac 840 ggcgcggagc tggaacggct gtgcgcgcggatgttcaccg ccctgcac 888 3 297 PRT Streptomyces pristinaespiralis 3 MetArg Gly Gly Ser Val Phe Gly Arg Cys Val Val Val Gly Gly Ala 1 5 10 15Gly Ala Val Gly Arg Met Phe Ser His Trp Leu Val Arg Ser Gly Val 20 25 30Ala Val Thr Trp Leu Asp Val Ala Gly Ala Gly Ala Ala Asp Gly Val 35 40 45Arg Val Val Ala Gly Asp Val Arg Arg Pro Gly Pro Glu Ala Val Ala 50 55 60Ala Leu Ala Ala Ala Asp Val Val Val Leu Ala Val Pro Glu Pro Val 65 70 7580 Ala Trp Glu Ala Val Glu Val Leu Ala Gly Val Met Arg Pro Gly Ala 85 9095 Val Leu Ala Asp Thr Leu Ser Val Lys Ser Arg Ile Ala Gly Arg Leu 100105 110 Arg Glu Ala Ala Pro Gly Leu Gln Ala Val Gly Leu Asn Pro Met Phe115 120 125 Ala Pro Ser Leu Gly Leu Gln Gly Arg Pro Val Ala Ala Val ValVal 130 135 140 Thr Asp Gly Pro Gly Val Arg Ala Leu Val Glu Leu Val AlaGly Trp 145 150 155 160 Gly Ala Arg Val Val Glu Met Pro Ala Arg Arg HisAsp Glu Leu Thr 165 170 175 Ala Ala Gln Gln Ala Ala Thr His Ala Ala ValLeu Ala Phe Gly Leu 180 185 190 Gly Leu Gly Glu Leu Ser Val Asp Val GlyAla Leu Arg Asp Ser Ala 195 200 205 Pro Pro Pro His Leu Ala Met Leu AlaLeu Leu Ala Arg Ile Ala Gly 210 215 220 Gly Thr Pro Glu Val Tyr Phe AspIle Gln Ala Ala Asn Pro Gly Ala 225 230 235 240 Pro Ala Ala Arg Gln AlaLeu Gly Arg Gly Leu Val Arg Leu Gly Gln 245 250 255 Ala Val Glu Arg GlyAsp Glu Glu Thr Phe Ala Ala Leu Phe Ala Glu 260 265 270 Leu Arg Gly ValLeu Gly Glu His Gly Ala Glu Leu Glu Arg Leu Cys 275 280 285 Ala Arg MetPhe Thr Ala Leu His Pro 290 295 4 387 DNA Streptomyces pristinaespiralis4 atgaccccgc ccgccatccc cgccgccccg cccgccaccg ggcccgcccc cgccaccgac 60cccctcgacg cgctgcgcgc ccgcctggac gccgcggacg ccgccctgct ggacgccgtc 120cgcacacgcc tggacatctg cctgcgcatc ggcgagtaca agcgcctcca ccaggtgccg 180atgatgcagc cccaccggat cgcccaggtc cacgccaacg ccgcccgcta cgccgccgac 240cacggcatcg accccgcctt cctgcgcacc ctgtacgaca cgatcatcac cgagacctgc 300cgcctcgagg acgagtggat cgcctccggc ggcgcccccg tccccacgcc cgtgcacgcg 360tccgcgtccg cgcggggggc cgtgtcg 387 5 130 PRT Streptomycespristinaespiralis 5 Met Thr Pro Pro Ala Ile Pro Ala Ala Pro Pro Ala ThrGly Pro Ala 1 5 10 15 Ala Ala Thr Asp Pro Leu Asp Ala Leu Arg Ala ArgLeu Asp Ala Ala 20 25 30 Asp Ala Ala Leu Leu Asp Ala Val Arg Thr Arg LeuAsp Ile Cys Leu 35 40 45 Arg Ile Gly Glu Tyr Lys Arg Leu His Gln Val ProMet Met Gln Pro 50 55 60 His Arg Ile Ala Gln Val His Ala Asn Ala Ala ArgTyr Ala Ala Asp 65 70 75 80 His Gly Ile Asp Pro Ala Phe Leu Arg Thr LeuTyr Asp Thr Ile Ile 85 90 95 Thr Glu Thr Cys Arg Leu Glu Asp Glu Trp IleAla Ser Gly Gly Ala 100 105 110 Pro Val Pro Thr Pro Val His Ala Ser AlaSer Ala Arg Gly Ala Val 115 120 125 Ser Pro 130 6 4496 DNA Streptomycespristinaespiralis 6 ctcgagcagg tgccccacct cggcggcacg gtgcgcgggcagcgcgaaca ccggcagcgc 60 gcccagacgg aacagcgcga agcacaccgc gacgaactcgggcgtgttcg gcagctgcac 120 cagcacccgc tcgccggcgc cgatcccgcg cgccgcgaaccccgccgcca gccggtcgca 180 ccagcggtcc agggcacggt aggtgacacg ggagcacccgtccgcgccga ccagcgcctc 240 ccgctcgccg tactgctccg cccagcggcc cagcagcatgcccagcggct cgccccgcca 300 gtagccggcc gcccggtact tcgcggccac atcctcgggccagggaacgc atccgtccag 360 catcgttggt cctttccggc ttcgtcctcg cgtcgcgcccagtgtcggca gcgccgttga 420 cacgccgctg atgcgccgcg cccgcgcgcc gccgctccgtcaggagccga tcagggcggc 480 gtcagccggg ccggacagga tgccgcccac ggggcccggcacaccgggcc gcggcgacag 540 cgggccggcg accggcaggc cgacaccacg cacggacgagaagaaacaac acaaggggag 600 cacccgatgg agacctgggt cctgggccgg cgcgacgtcgccgaggtggt ggccgccgtc 660 ggccgcgacg aactcatgcg ccgcatcatc gaccgcctcaccggcggact ggccgagatc 720 ggccgcggcg agcggcacct gtccccgctg cgcggcggactggaacgcag cgaacccgtg 780 cccggcatct gggaatggat gccgcaccgc gaacccggcgaccacatcac cctcaagacc 840 gtcggctaca gccccgccaa ccccggccgc ttcggcctgccgaccatcct gggcaccgtc 900 gcccgctacg acgacaccac cggcgccctg accgccctgatggacggcgt gctgctcacc 960 gccctgcgca ccggcgccgc ctccgccgtc gcctcccgcctgctggcccg ccccgacagc 1020 cacaccctgg gactgatcgg caccggcgcc caggccgtcacccaactgca cgccctgtcc 1080 ctggtactgc ccctgcaacg ggccctggtg tgggacaccgaccccgccca ccgggaaagc 1140 ttcgcccggc gcgccgcgtt caccggcgtc agcgtcgagatcgccgagcc cgcccggatc 1200 gccgccgagg ccgacgtcat ctccaccgcc acctcggtagccgtcggcca gggcccggtc 1260 ctgcccgaca ccggcgtccg cgagcacctg cacatcaacgccgtcggcgc ggacctcgtc 1320 ggcaagacgg aactgccgct cggcctgctc gagcgggcgttcgtcaccgc cgaccacccc 1380 gagcaggcgc tgcgcgaggg cgagtgccag caactctccgccgaccggct cggcccgcag 1440 ctggcccacc tgtgcgccga cccggcggcc gccgccggccggcaggacac cctgagcgtc 1500 ttcgactcca ccggcttcgc cttcgaggac gccctggcgatggaagtgtt cctcgaggcc 1560 gccgccgaac gggacctggg catccgggtg ggcatcgaacaccaccccgg cgacgccctg 1620 gacccctacg ccctccagcc cctgcccctg cccctggccgcccccgccca ctgacccccc 1680 ccttttttcg ggacccccgc tctttttcga gacccccgcccggccggccc ggccctcctc 1740 ccgccggccc ccatgcccgg ccgggccggg gcacccacgacgccctcgcg aggagagaga 1800 tgccccccac cccccggccc accaccgacg acggcggccgtgaactgctc gcctggctgc 1860 gcgagatgcg ccaccaccac cccgtccacg aggacgaatacggtgccttc cacgtcttcc 1920 ggcacgccga cgtcctcacc gtcgcctccg accccggcgtctactcctcc cagctcagcc 1980 ggctacggcc cggctcccag gcgttgagcg aacagatcctgtcggtcatc gacccgccga 2040 tgcaccgcac cctgcgccgc ctggtcagcc aggccttcaccccccgcacc gtcgccgacc 2100 tcgaaccacg cgtcaccgaa ctggccgggc aactgctcgacgccgtcgac ggcgacacgt 2160 tcgacctcgt cgccgacttc gcctacccgc tgcccgtgatcgtgatcgcc gaactcctcg 2220 gcgtgccgcc cgccgaccgc accctgttcc gctcctggtccgaccggatg ctgcagatgc 2280 aggtcgccga cccggcggac atgcagttcg gcgacgacgccgacgaggac taccaacgcc 2340 tcgtcaaaga acccatgcgc gccatgcacg cctacctccacgaccacgtc accgaccgcc 2400 gcgcccgccc cgcgaacgac ctgatctccg cactcgtcgccgcccgcgtg gagggcgaac 2460 gactcaccga cgagcagatc gtcgaattcg gggcgctgctgctgatggcc ggccacgtct 2520 ccacctccat gctgctcggc aacaccgtgc tgtgcctgaaggaccacccc cgggccgagg 2580 ccgccgcccg cgccgaccgg tccctgatcc ccgccctgatcgaagaagta ctgcggctgc 2640 ggccgccgat caccgtcatg gcccgcgtca ccaccaaggacaccgtcctc gccggcacca 2700 ccatccccgc cggacgcatg gtcgtgccct ccctgctgtccgccaaccac gacgaacagg 2760 tcttcaccga ccccgaccac ctcgacctcg cccgcgaaggccgccagatc gccttcggcc 2820 acggcatcca ctactgcctg ggcgccccgc tcgcccgcctggagggccgc atcgccctgg 2880 aagccctctt cgaccgattc cccgacttct cgcccaccgacggcgcaaaa ctgcgctacc 2940 accgcgacgg actgttcggc gtcaagaacc tgccgctgaccgtacggcgc ggctgacaca 3000 gacaaggggg ccacctggtg cgcaccgtgc gaaccctgctgatcgacaac tacgactcgt 3060 tcacctacaa cctcttccag atgctggccg aggtgaacggcgccgctccg ctcgtcgtcc 3120 gcaacgacga cacccgcacc tggcaggccc tggcgccgggcgacttcgac aacgtcgtcg 3180 tctcacccgg ccccggccac cccgccaccg acaccgacctgggcctcagc cgccgggtga 3240 tcaccgaatg ggacctgccg ctgctcgggg tgtgcctgggccaccaggcc ctgtgcctgc 3300 tcgccggcgc cgccgtcgtc cacgcacccg aaccctttcacggccgcacc agcgacatcc 3360 gccacgacgg gcagggcctg ttcgcgaaca tcccctccccgctgaccgtg gtccgctacc 3420 actcgctgac cgtccggcaa ctgcccgccg acctgcgcgccaccgcccac accgccgacg 3480 ggcagctgat ggccgtcgcc caccgccacc tgccccgcttcggcgtgcag ttccaccccg 3540 aatcgatcag cagcgaacac ggccaccgga tgctcgccaacttccgcgac ctgtccctgc 3600 gcgcggccgg ccaccgcccc ccgcacaccg aacgcatacccgcacccgca cccgcccccg 3660 cccccgcccc cgcaccggca ccgcccgcgt ccgcgccggtgggggagtac cggctgcatg 3720 tgcgcgaggt cgcctgcgtg cccgacgcgg acgccgcgttcaccgccctg ttcgccgacg 3780 ccccggcccg gttctggctc gacagcagcc gcgtcgagccgggcctcgcc cgcttcacct 3840 tcctcggcgc ccccgccggc ccgctcggcg aacagatcacctacgacgtc gccgaccggg 3900 ccgtgcgcgt caaggacggt tcaggcggcg agacccgccggcccggcacc ctcttcgacc 3960 acctggaaca cgaactggcc gcccgcgccc tgcccgccaccggcctgccc ttcgagttca 4020 acctcggcta cgtcggctac ctcggctacg agaccaaggccgacagcggc ggcgaggacg 4080 cccaccgcgg cgaactgccc gacggcgcct tcatgttcgccgaccggatg ctcgccctcg 4140 accacgaaca ggggcgggcc tggctcctgg cactgagcagcacccgacgg cccgccaccg 4200 cacccgccgc cgaacgctgg ctcaccgacg ccgcccggaccctcgccacc accgcccccc 4260 gcccgccctt caccctgctg cccgacgacc aactgcccgccctggacgtc cactaccgcc 4320 acagcctgcc ccgctaccgg gaactggtcg aggaatgccgccgcctgatc accgacggcg 4380 agacctacga ggtgtgcctg acgaacatgc tccgggtgcccggccggatc gacccgctca 4440 ccgcctaccg cgccctgcgc accgtcagcc ccgccccctacgccgcctac ctgcag 4496 7 1065 DNA Streptomyces pristinaespiralis 7atggagacct gggtcctggg ccggcgcgac gtcgccgagg tggtggccgc cgtcggccgc 60gacgaactca tgcgccgcat catcgaccgc ctcaccggcg gactggccga gatcggccgc 120ggcgagcggc acctgtcccc gctgcgcggc ggactggaac gcagcgaacc cgtgcccggc 180atctgggaat ggatgccgca ccgcgaaccc ggcgaccaca tcaccctcaa gaccgtcggc 240tacagccccg ccaaccccgg ccgcttcggc ctgccgacca tcctgggcac cgtcgcccgc 300tacgacgaca ccaccggcgc cctgaccgcc ctgatggacg gcgtgctgct caccgccctg 360cgcaccggcg ccgcctccgc cgtcgcctcc cgcctgctgg cccgccccga cagccacacc 420ctgggactga tcggcaccgg cgcccaggcc gtcacccaac tgcacgccct gtccctggta 480ctgcccctgc aacgggccct ggtgtgggac accgaccccg cccaccggga aagcttcgcc 540cggcgcgccg cgttcaccgg cgtcagcgtc gagatcgccg agcccgcccg gatcgccgcc 600gaggccgacg tcatctccac cgccacctcg gtagccgtcg gccagggccc ggtcctgccc 660gacaccggcg tccgcgagca cctgcacatc aacgccgtcg gcgcggacct cgtcggcaag 720acggaactgc cgctcggcct gctcgagcgg gcgttcgtca ccgccgacca ccccgagcag 780gcgctgcgcg agggcgagtg ccagcaactc tccgccgacc ggctcggccc gcagctggcc 840cacctgtgcg ccgacccggc ggccgccgcc ggccggcagg acaccctgag cgtcttcgac 900tccaccggct tcgccttcga ggacgccctg gcgatggaag tgttcctcga ggccgccgcc 960gaacgggacc tgggcatccg ggtgggcatc gaacaccacc ccggcgacgc cctggacccc 1020tacgccctcc agcccctgcc cctgcccctg gccgcccccg cccac 1065 8 356 PRTStreptomyces pristinaespiralis 8 Met Glu Thr Trp Val Leu Gly Arg Arg AspVal Ala Glu Val Val Ala 1 5 10 15 Ala Val Gly Arg Asp Glu Leu Met ArgArg Ile Ile Asp Arg Leu Thr 20 25 30 Gly Gly Leu Ala Glu Ile Gly Arg GlyGlu Arg His Leu Ser Pro Leu 35 40 45 Arg Gly Gly Leu Glu Arg Ser Glu ProVal Pro Gly Ile Trp Glu Trp 50 55 60 Met Pro His Arg Glu Pro Gly Asp HisIle Thr Leu Lys Thr Val Gly 65 70 75 80 Tyr Ser Pro Ala Asn Pro Gly ArgPhe Gly Leu Pro Thr Ile Leu Gly 85 90 95 Thr Val Ala Arg Tyr Asp Asp ThrThr Gly Ala Leu Thr Ala Leu Met 100 105 110 Asp Gly Val Leu Leu Thr AlaLeu Arg Thr Gly Ala Ala Ser Ala Val 115 120 125 Ala Ser Arg Leu Leu AlaArg Pro Asp Ser His Thr Leu Gly Leu Ile 130 135 140 Gly Thr Gly Ala GlnAla Val Thr Gln Leu His Ala Leu Ser Leu Val 145 150 155 160 Leu Pro LeuGln Arg Ala Leu Val Trp Asp Thr Asp Pro Ala His Arg 165 170 175 Glu SerPhe Ala Arg Arg Ala Ala Phe Thr Gly Val Ser Val Glu Ile 180 185 190 AlaGlu Pro Ala Arg Ile Ala Ala Glu Ala Asp Val Ile Ser Thr Ala 195 200 205Thr Ser Val Ala Val Gly Gln Gly Pro Val Leu Pro Asp Thr Gly Val 210 215220 Arg Glu His Leu His Ile Asn Ala Val Gly Ala Asp Leu Val Gly Lys 225230 235 240 Thr Glu Leu Pro Leu Gly Leu Leu Glu Arg Ala Phe Val Thr AlaAsp 245 250 255 His Pro Glu Gln Ala Leu Arg Glu Gly Glu Cys Gln Gln LeuSer Ala 260 265 270 Asp Arg Leu Gly Pro Gln Leu Ala His Leu Cys Ala AspPro Ala Ala 275 280 285 Ala Ala Gly Arg Gln Asp Thr Leu Ser Val Phe AspSer Thr Gly Phe 290 295 300 Ala Phe Glu Asp Ala Leu Ala Met Glu Val PheLeu Glu Ala Ala Ala 305 310 315 320 Glu Arg Asp Leu Gly Ile Arg Val GlyIle Glu His His Pro Gly Asp 325 330 335 Ala Leu Asp Pro Tyr Ala Leu GlnPro Leu Pro Leu Pro Leu Ala Ala 340 345 350 Pro Ala His Pro 355 9 1194DNA Streptomyces pristinaespiralis 9 atgcccccca ccccccggcc caccaccgacgacggcggcc gtgaactgct cgcctggctg 60 cgcgagatgc gccaccacca ccccgtccacgaggacgaat acggtgcctt ccacgtcttc 120 cggcacgccg acgtcctcac cgtcgcctccgaccccggcg tctactcctc ccagctcagc 180 cggctacggc ccggctccca ggcgttgagcgaacagatcc tgtcggtcat cgacccgccg 240 atgcaccgca ccctgcgccg cctggtcagccaggccttca ccccccgcac cgtcgccgac 300 ctcgaaccac gcgtcaccga actggccgggcaactgctcg acgccgtcga cggcgacacg 360 ttcgacctcg tcgccgactt cgcctacccgctgcccgtga tcgtgatcgc cgaactcctc 420 ggcgtgccgc ccgccgaccg caccctgttccgctcctggt ccgaccggat gctgcagatg 480 caggtcgccg acccggcgga catgcagttcggcgacgacg ccgacgagga ctaccaacgc 540 ctcgtcaaag aacccatgcg cgccatgcacgcctacctcc acgaccacgt caccgaccgc 600 cgcgcccgcc ccgcgaacga cctgatctccgcactcgtcg ccgcccgcgt ggagggcgaa 660 cgactcaccg acgagcagat cgtcgaattcggggcgctgc tgctgatggc cggccacgtc 720 tccacctcca tgctgctcgg caacaccgtgctgtgcctga aggaccaccc ccgggccgag 780 gccgccgccc gcgccgaccg gtccctgatccccgccctga tcgaagaagt actgcggctg 840 cggccgccga tcaccgtcat ggcccgcgtcaccaccaagg acaccgtcct cgccggcacc 900 accatccccg ccggacgcat ggtcgtgccctccctgctgt ccgccaacca cgacgaacag 960 gtcttcaccg accccgacca cctcgacctcgcccgcgaag gccgccagat cgccttcggc 1020 cacggcatcc actactgcct gggcgccccgctcgcccgcc tggagggccg catcgccctg 1080 gaagccctct tcgaccgatt ccccgacttctcgcccaccg acggcgcaaa actgcgctac 1140 caccgcgacg gactgttcgg cgtcaagaacctgccgctga ccgtacggcg cggc 1194 10 399 PRT Streptomycespristinaespiralis 10 Met Pro Pro Thr Pro Arg Pro Thr Thr Asp Asp Gly GlyArg Glu Leu 1 5 10 15 Leu Ala Trp Leu Arg Glu Met Arg His His His ProVal His Glu Asp 20 25 30 Glu Tyr Gly Ala Phe His Val Phe Arg His Ala AspVal Leu Thr Val 35 40 45 Ala Ser Asp Pro Gly Val Tyr Ser Ser Gln Leu SerArg Leu Arg Pro 50 55 60 Gly Ser Gln Ala Leu Ser Glu Gln Ile Leu Ser ValIle Asp Pro Pro 65 70 75 80 Met His Arg Thr Leu Arg Arg Leu Val Ser GlnAla Phe Thr Pro Arg 85 90 95 Thr Val Ala Asp Leu Glu Pro Arg Val Thr GluLeu Ala Gly Gln Leu 100 105 110 Leu Asp Ala Val Asp Gly Asp Thr Phe AspLeu Val Ala Asp Phe Ala 115 120 125 Tyr Pro Leu Pro Val Ile Val Ile AlaGlu Leu Leu Gly Val Pro Pro 130 135 140 Ala Asp Arg Thr Leu Phe Arg SerTrp Ser Asp Arg Met Leu Gln Met 145 150 155 160 Gln Val Ala Asp Pro AlaAsp Met Gln Phe Gly Asp Asp Ala Asp Glu 165 170 175 Asp Tyr Gln Arg LeuVal Lys Glu Pro Met Arg Ala Met His Ala Tyr 180 185 190 Leu His Asp HisVal Thr Asp Arg Arg Ala Arg Pro Ala Asn Asp Leu 195 200 205 Ile Ser AlaLeu Val Ala Ala Arg Val Glu Gly Glu Arg Leu Thr Asp 210 215 220 Glu GlnIle Val Glu Phe Gly Ala Leu Leu Leu Met Ala Gly His Val 225 230 235 240Ser Thr Ser Met Leu Leu Gly Asn Thr Val Leu Cys Leu Lys Asp His 245 250255 Pro Arg Ala Glu Ala Ala Ala Arg Ala Asp Arg Ser Leu Ile Pro Ala 260265 270 Leu Ile Glu Glu Val Leu Arg Leu Arg Pro Pro Ile Thr Val Met Ala275 280 285 Arg Val Thr Thr Lys Asp Thr Val Leu Ala Gly Thr Thr Ile ProAla 290 295 300 Gly Arg Met Val Val Pro Ser Leu Leu Ser Ala Asn His AspGlu Gln 305 310 315 320 Val Phe Thr Asp Pro Asp His Leu Asp Leu Ala ArgGlu Gly Arg Gln 325 330 335 Ile Ala Phe Gly His Gly Ile His Tyr Cys LeuGly Ala Pro Leu Ala 340 345 350 Arg Leu Glu Gly Arg Ile Ala Leu Glu AlaLeu Phe Asp Arg Phe Pro 355 360 365 Asp Phe Ser Pro Thr Asp Gly Ala LysLeu Arg Tyr His Arg Asp Gly 370 375 380 Leu Phe Gly Val Lys Asn Leu ProLeu Thr Val Arg Arg Gly Pro 385 390 395 11 1561 DNA Streptomycespristinaespiralis 11 aagcttcccg accgggtgga ggtcgtcgac gcgttcccgctgaccggcct caacaaggtc 60 gacaagaagg ccctggcggc cgacatcgcc gccaagaccgcccccacccg ccccaccacc 120 gccggccacg gcccgaccac ggacggcgat acggccggtgggggtgggtc cgcgggcggg 180 gtgacggccg ccggtggcgg gcgggaggag gcggcgtgagcgggcccggg cccgagggcg 240 gctaccgggt gccgttcgcg cgacgcggtt cggtggtgggcgaggcggac ctggcggcgc 300 tgggcgaact ggtccgctcg ggccggtcgc tgacgtcgggggtgtggcgg gagcggttcg 360 aggaacagtt cgcccgcctg accggcgccc ggcacgcgctcagtgtcacc agcggcaccg 420 tcgcgctgga actggcggtg cggatgctgg acctggcgccgggcgacgag gtgatcgcca 480 ccccgcagac gttccaggcg acggtgcagc cgctgctcgaccacgacgtg cggctgcggt 540 tctgcgacat cgacccggac accctcaacc tcgacccggcggtgctggag acgctgatca 600 ccgaccgcac ccgggcgatc ctgctcgtcc actacggcggcaacccggcc gacatggacc 660 gcatcatggc cctggcccgc aagcgcggca tcatcgtcgtcgaggacagc gcgcacgcgc 720 tgggcgccgt gtaccggggg cggcggccgg gggcactggcggacatcggc tgcttcactt 780 tccactccac gaagaacatc accaccctcg gcgagggcggcatgatcacc ctgtcgcgtg 840 acgagtgggc ccagcgggtg ggacgtatcc gcgacaacgaggccgacggc gtgtacgcgg 900 cgctgccgga ctccgcgcgg gcgggtgctc cggcgctgctgccgtggatg aagttcgcgg 960 agggtgtgta cggtcaccgg gcggtcgggg tccgcggggcgggcacgaac gcgacgatgt 1020 cggaggcggc ggcggcggtg ggcgtggtgc aactggcgtcgctggagcgg ttcgtggccc 1080 ggcgccggag catcgcgcag cggctggacg aggccgtggcctcggtggcc ggcacccggc 1140 tgcaccgggc ggcggcggac agtctgcacg cctaccacctgtacacgttc ttcctcaccg 1200 gcggccggca ggtgcgggag cggttcgtgc gcgccctggaccggctgggt gtggaggtcc 1260 agttgcggta cttcccgctc catctgtcgc ccgagtggcggctgcgcggc cacgggccgg 1320 gcgagtgtcc gacggccgaa cgggtctggt tcgaggagcacatgaacctg ccgtgccatc 1380 ccggtctgag tgacggccag gtcgactaca tggtcgaggcggtcacccgc gccctgcacg 1440 aggcccacgg cacggggacg cgggtggcgg ccgggcacctgtgacaccgt ccgcatccgg 1500 ccggtggttt tccaagaccg agggagaggc aggcgtatgccgttcatcga agtgaagatc 1560 t 1561 12 1233 DNA Streptomycespristinaespiralis 12 gtgccgttcg cgcgacgcgg ttcggtggtg ggcgaggcggacctggcggc gctgggcgaa 60 ctggtccgct cgggccggtc gctgacgtcg ggggtgtggcgggagcggtt cgaggaacag 120 ttcgcccgcc tgaccggcgc ccggcacgcg ctcagtgtcaccagcggcac cgtcgcgctg 180 gaactggcgg tgcggatgct ggacctggcg ccgggcgacgaggtgatcgc caccccgcag 240 acgttccagg cgacggtgca gccgctgctc gaccacgacgtgcggctgcg gttctgcgac 300 atcgacccgg acaccctcaa cctcgacccg gcggtgctggagacgctgat caccgaccgc 360 acccgggcga tcctgctcgt ccactacggc ggcaacccggccgacatgga ccgcatcatg 420 gccctggccc gcaagcgcgg catcatcgtc gtcgaggacagcgcgcacgc gctgggcgcc 480 gtgtaccggg ggcggcggcc gggggcactg gcggacatcggctgcttcac tttccactcc 540 acgaagaaca tcaccaccct cggcgagggc ggcatgatcaccctgtcgcg tgacgagtgg 600 gcccagcggg tgggacgtat ccgcgacaac gaggccgacggcgtgtacgc ggcgctgccg 660 gactccgcgc gggcgggtgc tccggcgctg ctgccgtggatgaagttcgc ggagggtgtg 720 tacggtcacc gggcggtcgg ggtccgcggg gcgggcacgaacgcgacgat gtcggaggcg 780 gcggcggcgg tgggcgtggt gcaactggcg tcgctggagcggttcgtggc ccggcgccgg 840 agcatcgcgc agcggctgga cgaggccgtg gcctcggtggccggcacccg gctgcaccgg 900 gcggcggcgg acagtctgca cgcctaccac ctgtacacgttcttcctcac cggcggccgg 960 caggtgcggg agcggttcgt gcgcgccctg gaccggctgggtgtggaggt ccagttgcgg 1020 tacttcccgc tccatctgtc gcccgagtgg cggctgcgcggccacgggcc gggcgagtgt 1080 ccgacggccg aacgggtctg gttcgaggag cacatgaacctgccgtgcca tcccggtctg 1140 agtgacggcc aggtcgacta catggtcgag gcggtcacccgcgccctgca cgaggcccac 1200 ggcacgggga cgcgggtggc ggccgggcac ctg 1233 13412 PRT Streptomyces pristinaespiralis 13 Val Pro Phe Ala Arg Arg GlySer Val Val Gly Glu Ala Asp Leu Ala 1 5 10 15 Ala Leu Gly Glu Leu ValArg Ser Gly Arg Ser Leu Thr Ser Gly Val 20 25 30 Trp Arg Glu Arg Phe GluGlu Gln Phe Ala Arg Leu Thr Gly Ala Arg 35 40 45 His Ala Leu Ser Val ThrSer Gly Thr Val Ala Leu Glu Leu Ala Val 50 55 60 Arg Met Leu Asp Leu AlaPro Gly Asp Glu Val Ile Ala Thr Pro Gln 65 70 75 80 Thr Phe Gln Ala ThrVal Gln Pro Leu Leu Asp His Asp Val Arg Leu 85 90 95 Arg Phe Cys Asp IleAsp Pro Asp Thr Leu Asn Leu Asp Pro Ala Val 100 105 110 Leu Glu Thr LeuIle Thr Asp Arg Thr Arg Ala Ile Leu Leu Val His 115 120 125 Tyr Gly GlyAsn Pro Ala Asp Met Asp Arg Ile Met Ala Leu Ala Arg 130 135 140 Lys ArgGly Ile Ile Val Val Glu Asp Ser Ala His Ala Leu Gly Ala 145 150 155 160Val Tyr Arg Gly Arg Arg Pro Gly Ala Leu Ala Asp Ile Gly Cys Phe 165 170175 Thr Phe His Ser Thr Lys Asn Ile Thr Thr Leu Gly Glu Gly Gly Met 180185 190 Ile Thr Leu Ser Arg Asp Glu Trp Ala Gln Arg Val Gly Arg Ile Arg195 200 205 Asp Asn Glu Ala Asp Gly Val Tyr Ala Ala Leu Pro Asp Ser AlaArg 210 215 220 Ala Gly Ala Pro Ala Leu Leu Pro Trp Met Lys Phe Ala GluGly Val 225 230 235 240 Tyr Gly His Arg Ala Val Gly Val Arg Gly Ala GlyThr Asn Ala Thr 245 250 255 Met Ser Glu Ala Ala Ala Ala Val Gly Val ValGln Leu Ala Ser Leu 260 265 270 Glu Arg Phe Val Ala Arg Arg Arg Ser IleAla Gln Arg Leu Asp Glu 275 280 285 Ala Val Ala Ser Val Ala Gly Thr ArgLeu His Arg Ala Ala Ala Asp 290 295 300 Ser Leu His Ala Tyr His Leu TyrThr Phe Phe Leu Thr Gly Gly Arg 305 310 315 320 Gln Val Arg Glu Arg PheVal Arg Ala Leu Asp Arg Leu Gly Val Glu 325 330 335 Val Gln Leu Arg TyrPhe Pro Leu His Leu Ser Pro Glu Trp Arg Leu 340 345 350 Arg Gly His GlyPro Gly Glu Cys Pro Thr Ala Glu Arg Val Trp Phe 355 360 365 Glu Glu HisMet Asn Leu Pro Cys His Pro Gly Leu Ser Asp Gly Gln 370 375 380 Val AspTyr Met Val Glu Ala Val Thr Arg Ala Leu His Glu Ala His 385 390 395 400Gly Thr Gly Thr Arg Val Ala Ala Gly His Leu Pro 405 410 14 2220 DNAStreptomyces pristinaespiralis 14 ggcgtcaaga acctgccgct gaccgtacggcgcggctgac acagacaagg gggccacctg 60 gtgcgcaccg tgcgaaccct gctgatcgacaactacgact cgttcaccta caacctcttc 120 cagatgctgg ccgaggtgaa cggcgccgctccgctcgtcg tccgcaacga cgacacccgc 180 acctggcagg ccctggcgcc gggcgacttcgacaacgtcg tcgtctcacc cggccccggc 240 caccccgcca ccgacaccga cctgggcctcagccgccggg tgatcaccga atgggacctg 300 ccgctgctcg gggtgtgcct gggccaccaggccctgtgcc tgctcgccgg cgccgccgtc 360 gtccacgcac ccgaaccctt tcacggccgcaccagcgaca tccgccacga cgggcagggc 420 ctgttcgcga acatcccctc cccgctgaccgtggtccgct accactcgct gaccgtccgg 480 caactgcccg ccgacctgcg cgccaccgcccacaccgccg acgggcagct gatggccgtc 540 gcccaccgcc acctgccccg cttcggcgtgcagttccacc ccgaatcgat cagcagcgaa 600 cacggccacc ggatgctcgc caacttccgcgacctgtccc tgcgcgcggc cggccaccgc 660 cccccgcaca ccgaacgcat acccgcacccgcacccgccc ccgcccccgc ccccgcaccg 720 gcaccgcccg cgtccgcgcc ggtgggggagtaccggctgc atgtgcgcga ggtcgcctgc 780 gtgcccgacg cggacgccgc gttcaccgccctgttcgccg acgccccggc ccggttctgg 840 ctcgacagca gccgcgtcga gccgggcctcgcccgcttca ccttcctcgg cgcccccgcc 900 ggcccgctcg gcgaacagat cacctacgacgtcgccgacc gggccgtgcg cgtcaaggac 960 ggttcaggcg gcgagacccg ccggcccggcaccctcttcg accacctgga acacgaactg 1020 gccgcccgcg ccctgcccgc caccggcctgcccttcgagt tcaacctcgg ctacgtcggc 1080 tacctcggct acgagaccaa ggccgacagcggcggcgagg acgcccaccg cggcgaactg 1140 cccgacggcg ccttcatgtt cgccgaccggatgctcgccc tcgaccacga acaggggcgg 1200 gcctggctcc tggcactgag cagcacccgacggcccgcca ccgcacccgc cgccgaacgc 1260 tggctcaccg acgccgcccg gaccctcgccaccaccgccc cccgcccgcc cttcaccctg 1320 ctgcccgacg accaactgcc cgccctggacgtccactacc gccacagcct gccccgctac 1380 cgggaactgg tcgaggaatg ccgccgcctgatcaccgacg gcgagaccta cgaggtgtgc 1440 ctgacgaaca tgctccgggt gcccggccggatcgacccgc tcaccgccta ccgcgccctg 1500 cgcaccgtca gccccgcccc ctacgccgcctacctgcagt tccccggggc caccgtgctc 1560 agctcctcac ccgaacggtt cctgcgcatcggcgcggacg gttgggcgga gtccaaaccc 1620 atcaagggca cccgcccccg cggcgccggccccgcccagg acgccgccgt caaggcctcc 1680 ctcgccgcgg ccgagaagga ccgcagcgagaacctgatga tcgtcgacct ggtccgcaac 1740 gacctcggcc aggtctgcga catcggctccgtccacgtac cgggcctgtt cgaggtggag 1800 acctacgcca ccgtccacca gctcgtcagcacggtccgcg gccgcctggc ggccgacgtc 1860 tcccgccccc gcgcggtacg ggccgccttccccggcgggt cgatgaccgg cgcgcccaag 1920 gtccgcacca tgcagttcat cgaccggctcgagaagggcc cgcgcggcgt gtactcgggc 1980 gcgctgggct acttcgccct cagcggcgcggccgacctca gcatcgtcat ccgcaccatc 2040 gtcgccaccg aggaggccgc caccatcggcgtgggcggcg ccgtcgtcgc cctgtccgac 2100 cccgacgacg aggtccgcga aatgctcctcaaggcgcaga ccaccctcgc cgccctgcgc 2160 caggcacacg cgggcgccac cgcctcggaccgtgaactcc tggccggcag cctgcggtga 2220 15 719 PRT Streptomycespristinaespiralis 15 Val Arg Thr Val Arg Thr Leu Leu Ile Asp Asn Tyr AspSer Phe Thr 1 5 10 15 Tyr Asn Leu Phe Gln Met Leu Ala Glu Val Asn GlyAla Ala Pro Leu 20 25 30 Val Val Arg Asn Asp Asp Thr Arg Thr Trp Gln AlaLeu Ala Pro Gly 35 40 45 Asp Phe Asp Asn Val Val Val Ser Pro Gly Pro GlyHis Pro Ala Thr 50 55 60 Asp Thr Asp Leu Gly Leu Ser Arg Arg Val Ile ThrGlu Trp Asp Leu 65 70 75 80 Pro Leu Leu Gly Val Cys Leu Gly His Gln AlaLeu Cys Leu Leu Ala 85 90 95 Gly Ala Ala Val Val His Ala Pro Glu Pro PheHis Gly Arg Thr Ser 100 105 110 Asp Ile Arg His Asp Gly Gln Gly Leu PheAla Asn Ile Pro Ser Pro 115 120 125 Leu Thr Val Val Arg Tyr His Ser LeuThr Val Arg Gln Leu Pro Ala 130 135 140 Asp Leu Arg Ala Thr Ala His ThrAla Asp Gly Gln Leu Met Ala Val 145 150 155 160 Ala His Arg His Leu ProArg Phe Gly Val Gln Phe His Pro Glu Ser 165 170 175 Ile Ser Ser Glu HisGly His Arg Met Leu Ala Asn Phe Arg Asp Leu 180 185 190 Ser Leu Arg AlaAla Gly His Arg Pro Pro His Thr Glu Arg Ile Pro 195 200 205 Ala Pro AlaPro Ala Pro Ala Pro Ala Pro Ala Pro Ala Pro Pro Ala 210 215 220 Ser AlaPro Val Gly Glu Tyr Arg Leu His Val Arg Glu Val Ala Cys 225 230 235 240Val Pro Asp Ala Asp Ala Ala Phe Thr Ala Leu Phe Ala Asp Ala Pro 245 250255 Ala Arg Phe Trp Leu Asp Ser Ser Arg Val Glu Pro Gly Leu Ala Arg 260265 270 Phe Thr Phe Leu Gly Ala Pro Ala Gly Pro Leu Gly Glu Gln Ile Thr275 280 285 Tyr Asp Val Ala Asp Arg Ala Val Arg Val Lys Asp Gly Ser GlyGly 290 295 300 Glu Thr Arg Arg Pro Gly Thr Leu Phe Asp His Leu Glu HisGlu Leu 305 310 315 320 Ala Ala Arg Ala Leu Pro Ala Thr Gly Leu Pro PheGlu Phe Asn Leu 325 330 335 Gly Tyr Val Gly Tyr Leu Gly Tyr Glu Thr LysAla Asp Ser Gly Gly 340 345 350 Glu Asp Ala His Arg Gly Glu Leu Pro AspGly Ala Phe Met Phe Ala 355 360 365 Asp Arg Met Leu Ala Leu Asp His GluGln Gly Arg Ala Trp Leu Leu 370 375 380 Ala Leu Ser Ser Thr Arg Arg ProAla Thr Ala Pro Ala Ala Glu Arg 385 390 395 400 Trp Leu Thr Asp Ala AlaArg Thr Leu Ala Thr Thr Ala Pro Arg Pro 405 410 415 Pro Phe Thr Leu LeuPro Asp Asp Gln Leu Pro Ala Leu Asp Val His 420 425 430 Tyr Arg His SerLeu Pro Arg Tyr Arg Glu Leu Val Glu Glu Cys Arg 435 440 445 Arg Leu IleThr Asp Gly Glu Thr Tyr Glu Val Cys Leu Thr Asn Met 450 455 460 Leu ArgVal Pro Gly Arg Ile Asp Pro Leu Thr Ala Tyr Arg Ala Leu 465 470 475 480Arg Thr Val Ser Pro Ala Pro Tyr Ala Ala Tyr Leu Gln Phe Pro Gly 485 490495 Ala Thr Val Leu Ser Ser Ser Pro Glu Arg Phe Leu Arg Ile Gly Ala 500505 510 Asp Gly Trp Ala Glu Ser Lys Pro Ile Lys Gly Thr Arg Pro Arg Gly515 520 525 Ala Gly Pro Ala Gln Asp Ala Ala Val Lys Ala Ser Leu Ala AlaAla 530 535 540 Glu Lys Asp Arg Ser Glu Asn Leu Met Ile Val Asp Leu ValArg Asn 545 550 555 560 Asp Leu Gly Gln Val Cys Asp Ile Gly Ser Val HisVal Pro Gly Leu 565 570 575 Phe Glu Val Glu Thr Tyr Ala Thr Val His GlnLeu Val Ser Thr Val 580 585 590 Arg Gly Arg Leu Ala Ala Asp Val Ser ArgPro Arg Ala Val Arg Ala 595 600 605 Ala Phe Pro Gly Gly Ser Met Thr GlyAla Pro Lys Val Arg Thr Met 610 615 620 Gln Phe Ile Asp Arg Leu Glu LysGly Pro Arg Gly Val Tyr Ser Gly 625 630 635 640 Ala Leu Gly Tyr Phe AlaLeu Ser Gly Ala Ala Asp Leu Ser Ile Val 645 650 655 Ile Arg Thr Ile ValAla Thr Glu Glu Ala Ala Thr Ile Gly Val Gly 660 665 670 Gly Ala Val ValAla Leu Ser Asp Pro Asp Asp Glu Val Arg Glu Met 675 680 685 Leu Leu LysAla Gln Thr Thr Leu Ala Ala Leu Arg Gln Ala His Ala 690 695 700 Gly AlaThr Ala Ser Asp Arg Glu Leu Leu Ala Gly Ser Leu Arg 705 710 715 16 962DNA Streptomyces pristinaespiralis 16 ctcgaggacg agtggatcgc ctccggcggcgcccccgtcc ccacgcccgt gcacgcgtcc 60 gcgtccgcgc ggggggccgt gctgtgaccgccgccgcacc caccctcgcc caggcgctgg 120 acgaggccac cgggcagctg accggcgccgggatcaccgc cgacgccgcc cgggccgaca 180 cccggctgct ggccgcccac gcctgccaggtcgccccggg ggacctcgac acctgcctgg 240 ccggcccggt gccgccccgg ttctggcactacgtccggcg ccgtctgacc cgcgaacccg 300 ccgaacgcat cgtcggccac gcctacttcatgggccaccg cttcgacctg gcccccggcg 360 tcttcgtccc caaacccgag accgaggagatcacccggga cgccatcgcc cgcctggagg 420 ccctcgtccg ccgcggcacc accgcacccctggtcgtcga cctgtgcgcc ggaccgggca 480 ccatggccgt caccctggcc cgccacgtaccggccgcccg cgtcctgggc atcgaactct 540 cccaggccgc cgcccgcgcc gcccggcgcaacgcccgcgg caccggcgcc cgcatcgtgc 600 agggcgacgc ccgcgacgcc ttccccgaactgagcggcac cgtcgacctc gtcgtcacca 660 acccgcccta catccccatc ggactgcgcacctccgcacc cgaagtgctc gagcacgacc 720 cgccgctggc cctgtgggcc ggggaggagggcctcggcat gatccgcgcc atggaacgca 780 ccgcggcccg gctgctggcc cccggcggcgtcctgctcct cgaacacggc tcctaccaac 840 tcgcctccgt gcccgccctg ttccgcgcaaccggccgctg gagccacgcc tcgtcccgtc 900 ccacctgcaa cgacggctgc ctgaccgccgtacgcaacca cacctgcgca ccgcccgcct 960 ga 962 17 292 PRT Streptomycespristinaespiralis 17 Val Thr Ala Ala Ala Pro Thr Leu Ala Gln Ala Leu AspGlu Ala Thr 1 5 10 15 Gly Gln Leu Thr Gly Ala Gly Ile Thr Ala Asp AlaAla Arg Ala Asp 20 25 30 Thr Arg Leu Leu Ala Ala His Ala Cys Gln Val AlaPro Gly Asp Leu 35 40 45 Asp Thr Cys Leu Ala Gly Pro Val Pro Pro Arg PheTrp His Tyr Val 50 55 60 Arg Arg Arg Leu Thr Arg Glu Pro Ala Glu Arg IleVal Gly His Ala 65 70 75 80 Tyr Phe Met Gly His Arg Phe Asp Leu Ala ProGly Val Phe Val Pro 85 90 95 Lys Pro Glu Thr Glu Glu Ile Thr Arg Asp AlaIle Ala Arg Leu Glu 100 105 110 Ala Leu Val Arg Arg Gly Thr Thr Ala ProLeu Val Val Asp Leu Cys 115 120 125 Ala Gly Pro Gly Thr Met Ala Val ThrLeu Ala Arg His Val Pro Ala 130 135 140 Ala Arg Val Leu Gly Ile Glu LeuSer Gln Ala Ala Ala Arg Ala Ala 145 150 155 160 Arg Arg Asn Ala Arg GlyThr Gly Ala Arg Ile Val Gln Gly Asp Ala 165 170 175 Arg Asp Ala Phe ProGlu Leu Ser Gly Thr Val Asp Leu Val Val Thr 180 185 190 Asn Pro Pro TyrIle Pro Ile Gly Leu Arg Thr Ser Ala Pro Glu Val 195 200 205 Leu Glu HisAsp Pro Pro Leu Ala Leu Trp Ala Gly Glu Glu Gly Leu 210 215 220 Gly MetIle Arg Ala Met Glu Arg Thr Ala Ala Arg Leu Leu Ala Pro 225 230 235 240Gly Gly Val Leu Leu Leu Glu His Gly Ser Tyr Gln Leu Ala Ser Val 245 250255 Pro Ala Leu Phe Arg Ala Thr Gly Arg Trp Ser His Ala Ser Ser Arg 260265 270 Pro Thr Cys Asn Asp Gly Cys Leu Thr Ala Val Arg Asn His Thr Cys275 280 285 Ala Pro Pro Ala 290

What is claimed is:
 1. A process for preparing a streptogramin analog,comprising the steps of selecting a streptogramin-producingmicroorganism strain which possesses at least one genetic modificationwhich prevents the synthesis of an active enzyme encoded by at least onenucleic acid sequence consisting of a single gene comprising a sequenceselected from SEQ ID NO. 14, SEQ ID NO. 16, SEQ ID No. 2, SEQ ID No. 4,SEQ ID No. 7, SEQ ID No. 9, and SEQ ID No. 12, genes isolated from S.pristinaespiralis which correspond to the papA, papM, papC, papB, pipA,snbF, and hpaA genes and encode a polypeptide with the enzymaticactivity of the papA, papM, papC, papB, pipA, snbF, and hpaApolypeptides, and genes which code for polypeptides encoded by the papA,papM, papC, papB, pipA, snbF, and hpaA genes and differ from those geneson account of the degeneracy of the genetic code; growing saidstreptogramin-producing microorganism on a culture medium which isappropriate for said microorganism and which is supplemented with atleast one precursor analog; and recovering said streptogramin analogfrom said culture medium.
 2. The process according to claim 1, whereinat least one of the nucleic acid sequence selected from the papA (SEQ IDNo. 14), papM (SEQ ID No. 16), papC, (SEQ ID NO: 2), papB (SEQ ID NO:4), pipA (SEQ ID NO: 7), snbF (SEQ ID NO: 9) and hpaA (SEQ ID NO: 12)genes.
 3. The process according to one of claims 1 or 2, wherein thegenetic modification prevents the synthesis of an active enzyme encodedby at least one nucleic acid esquence selected from the papA (SEQ IDNo.14), papM (SEQ ID No. 16), papC (SEQ ID No. 2), papB (SEQ ID No. 4),pipA (SEQ ID No. 7), snbF (SEQ ID No. 9), and hpaA (SEQ ID No. 12). 4.The process according to claim 3, wherein the genetic modificationconsists of a disruption of one gene selected from the papA (SEQ ID No.14), papM (SEQ ID No. 16), papC (SEQ ID No. 2), papB (SEQ ID No. 4),pipA (SEQ ID No. 7), snbF (SEQ ID No. 9), and hpaA (SEQ ID No. 12). 5.The process according to claim 1, wherein the said microorganism isderived from the strain S. pristinaespiralis.
 6. The process accordingto claim 1, wherein the precursor analog, which is introduced into theculture medium, is selected from derivatives or analogues of amino acidsand alpha-ketocarboxylic acids.
 7. The process according to claim 6,wherein the precursor analog is related to the precursor whosebiosynthesis is altered.
 8. The process according to claim 6, whereinthe precursor analog is a derivative of phenylalanine when the genewhose expression is altered relates to the biosynthesis of4-dimethylamino-L-phenylalanine (DMPAPA).
 9. An isolated nucleic acidsequence, consisting of a single gene or a portion of a single genecomprising a sequence selected from among: (a) SEQ ID No. 2, SEQ ID No.4, SEQ ID No. 7, SEQ ID No. 9, and SEQ ID No. 12, (b) genes isolatedfrom S. pristinaespiralis which correspond to papC , papB, pipA, snbF,and hpaA and encode polypeptides with the enzymatic activity of papC,papB, pipA, snbF, and hpaA polypeptides, and (c) sequences which codefor polypeptides encoded by the nucleic acid sequences of (a) and (b)and differ from (a) and (b) sequences on account of the degeneracy ofthe genetic code.
 10. An isolated nucleic acid sequence according toclaim 9, which is selected from the papC (SEQ ID No. 2), papB (SEQ IDNo. 4), pipA (SEQ ID No. 7), snbF (SEQ ID No. 9) and hpaA (SEQ ID No.12)genes.
 11. Recombinant DNA consisting of a single gene comprising anucleic acid sequence selected among papC (SEQ ID NO. 2), papB (SEQ IDNO. 4), pipA (SEQ ID NO. 7), snbF (SEQ ID No. 9), and hpaA (SEQ ID No.12).
 12. Vector, which encompasses a nucleotide sequence according toclaim 9 or a recombinant DNA according to claim
 11. 13. The processaccording to claim 5, wherein the S. pristinaespiralis strain is derivedfrom S. pristinaespiralis SP92.
 14. A mutant S. pristinaespiralisstrain, which possesses a genetic modification which consists of adisruption of the papA gene (SEQ ID NO. 14) by double homologousrecombination.
 15. The mutant S. pristinaespiralis strain according toclaim 14, wherein the strain is SP212 (ATCC Accession No. 25486).
 16. Amutant S. pristinaespiralis strain comprising at least one geneticmodification in at least one of its papC (SEQ ID No. 2), papB (SEQ IDNo. 4), pipA (SEQ ID No. 7), snbF (SEQ ID No. 9) and hpaA (SEQ ID No.12) genes, wherein said genetic modification prevents synthesis of anactive enzyme encoded by said genes.
 17. The mutant S. pristinaespiralisstrain according to claim 16, wherein at least the pipA gene (SEQ ID No.7) is modified.
 18. The mutant S. pristinaespiralis strain according toclaim 16, wherein at least the hpaA gene (SEQ ID No. 12) is modified.19. A method for preparing a streptogramin precursor comprisingculturing the mutant S. pristinaespiralis strain according to claim 16on a culture medium which is appropriate to said strain; and recoveringsaid streptogramin precursor.
 20. An isolated and purified polypeptidewhich results from the expression of the nucleic acid sequence of SEQ IDNo. 7.